As much as I love costumes and characterization, a minotaur costume may be a bit overwhelming, at least for a Belegarth battlefield.
You will want as much visibility as you can and wearing a bull's head will only make you the biggest target on the field.
Perhaps you could stylize a helmet and shield with minotaur motifs, and then have an elaborate headdress/mask for those times outside the battlefield.
Don't get me wrong, I would love to see more elaborate garb and characters on the field, but the truth is that a bull's physiognomy is very different from a human's. The eyes are on the wrong place, the temple and snout are too far apart, etc.
You could make an awesome-looking mask and you'll still end up taking it off after the first 20 mins of battle, mainly because you'll be hot, sweaty and tired of being flanked because you can't see them coming at you.
As for the approach, you don't need a full body suit. The classic mythology minotaur was simply a man with a bull's head, very much like this one:
![Image](http://www.108fineart.com/artists/paul_reid/PAINTINGS/minotaur.JPG)
Regardless of the decision you make, best of luck and hope to meet you in the field in the near future at any of the Belegarth national events.
"Never violate a woman, nor harm a child. Do not lie, cheat or steal.
These things are for lesser men.
Protect the weak against the evil strong.
And never allow thoughts of gain to lead you into the pursuit of evil."
-The Iron Code of Druss.