Not sure if it's needed but it doesn't hurt your chances any.

Remember the old buckskin jacket and pants with the fringe. That was the first camo. The most important thing to remember in choosing camo is that it breaks up your outline like the fringe and is made of a natural material or a synthetic that imitiates natural materials. The reason buckskin or other natural materials are better than synthetics is that synthetics can reflect light unnatually. Is camo necessary? I don't know, but hunters have been using it in one form or another since time immemorable. And like a wise man* once said " it doesn't hurt your chances any".
*steve182

Ive hunted with camouflage shirts and coats while werein jeans and i actually shot my deer last night like that with my bow. in a stand it is important on the ground it is important in a blind not quite as much. I would wear it but dont go broke over it.

I always use camo, but i hunt from brush blinds, i track, still hunt, stuff like that. Wile deer are coler blind, they can see ultraviolet light, and most sent free detergents kill those brightners, the best is dead down wind. (there is no such thing as sent free but fresh earth sent-a-way spray with deer pee on your boots does confues them) Also, washing yor orange clothing in that detergent, will make it duller to deer, but brighter (only slightly) to humans. I also take these measures when hunting preadators. Even using deer pee. Also, ALWAYS stay downwind.