X2 #1 is definently the cleanest layout and good looking...one, its the cleanest looking one the others are a bit 'busy'
We're having the inside of the door decaled, so no worries there.When the side door is open, you will not be able to see a bunch of sponsor decals. Are you wrapping the whole trailer?
#1
#3 would only work if you paint some scalps on the trailer.