I think the armbands work well. Its only onto the latter part of the game that it starts to take toll due to sides rushing swapping sides then on your way back hunting them down you gotta double check friendly or foe
If I'm at a big game, it seems to be armbands mostly. I always take two or three playing tops and masks, so I'm able to avoid having the wrong colours on for my side.
Armbands, on both arms, got no armband on an arm... then get shot, back to camp, another arm band put on. (I fell like I should say when I say armband, I refer to coloured tape around the arm and not the floatation device)