I think there's a sort of localized guild of merchants that sell at Dur-Demarion events. You might see if that's still around.

Just wondering if there was one with any sort of organization.
I am a merchant. If there's something going on, I'd like to be involved. Are you just around for specific events, though?

Dur-Demarion Vendors Guild
Bylaws – Effective as of September 2010
1) All registered Guild Vendors will be charged the event’s pre-registration price unless the vendor(s) are staying in a pre-reserved cabin. Pre-registration prices are only for vendors who are not staying within one of the cabins within Group Camp I.
2) Registered Guild Vendors will be allowed access to Group Camp I to set up their booths at a minimum of one half (1/2) hour before Troll opens, unless otherwise specified. If any vendor needs help with their booth set-up, loading or unloading, please contact Ora at least two weeks before the first day of the event to make arrangements. Upon arrival to the event all vendors and their helpers must check in with Troll to receive any last minute information. If you arrive on the first day, before normal check-in time, check in with Troll or find whoever is in charge of Troll before setting up your booth and receive any last minute information. Vendors who fail to check in may be asked to leave and made to wait to check in at normal check-in time. A list will be left with Troll of all Guild Members.
3) Merchant Row set up is based upon first-come, first-served* and your arrival time/day will determine where you may set up your booth/tenting area in Merchant Row. All Guild members will be placed alongside the fighting field in what used to be the area designated for tenting and will be designated as “Merchants Row Only”. This will place all vendors in a location visible from the fighting field and will also provide electricity, water and restrooms.
*Twisted Unicorn will set up on the front porch of the Great Hall and Ladies of the Lace will be located in the first area closest to the bath house. If anyone doesn’t understand this, please see Ora. Veteran Guild members are currently defined as those who were in attendance as of Beltaine XV, April 2009.
4) If you need electricity* for your booth and all areas near the Great Hall are occupied, please see Ora before setting up your booth. Vendors not in need of electricity for their booths will set up their booths in areas where electricity is not available to allow vendors in need of electricity to have access to it. Extension cords and surge protectors will be provided by the event coordinators, but you are encouraged to bring your own extension cords to ensure power is accessible to your booth. Requests for electricity must be made no less than two weeks prior to the first day of the event.
*Electric outlets are limited, so it is also considered first-come, first-serve until all available outlets are in use. Please let Ora know ahead of time if you need access to electricity. You are also required to provide your own extension cords so make sure you bring them long enough to reach.
5) Vendors wishing to camp with their booth or within their booth may do so.
6) Guild members* will have first choice of setting up in Merchant Row. All other vendors will be assigned spaces on a first-come first-served basis, but registered Guild Members will be given preference. If a vendor is not registered with the Guild they will be given the secondary spaces available.
7) If you know of anyone wishing to register with the Guild please have them contact Ora at ladysaaphire@yahoo.com. At present there is no charge to register with the Guild.
8 ) Vendors and registered Guild Vendors who have agreed to donate an item or items with minimum value to be given away by the event coordinators as event prizes may do so, but it is not mandatory. If you are interested in donating an item from you booth, please contact Ora or an event coordinator.
9) Upon registration all Guild members must list their main items of sale (ie jewelry, pottery, swords, etc). We want as many vendors as we can fill into our spaces, but we’d like to have a variety of choices to help ensure all-around vendor sales. The Guild reserves the right to refuse vendor set-up if we feel there are not enough event attendees to guarantee equitable sales. The Guild was created to prevent duplication of merchandise while still allowing free trade.
10) Nighttime security* is being provided for the whole event, but you are encouraged to secure your items and booth to help avoid theft. If you are the victim of a theft from your booth, please contact the event security as soon as possible. Contacting outside law enforcement is discouraged as it may threaten our relationship with our site, so please, please, please contact security or the event coordinator before picking up your cell phone. If you contact outside law enforcement before seeking event security or coordinator you will be banned from the Guild and will no longer be able to vend at any Dur-Demarion events.
*We aren’t always guaranteed nighttime security, so please be sure to secure your booths or stay within or near them.
11) With the exception of the time you are setting up or tearing down, ALL vendors are expected to wear garb while in attendance of an event,
These bylaws are subject to change