I have heard of guys making cubby sets with waxed cardboard boxes, they fold down flat for ease of carrying and hold up to the weather pretty well. Especially when its really cold the waxed boxes won't freeze to the ground like a regular cardboard box. Might be worth a try, another thing that might be easier than trail set 220s would be snares. Snares are really easy to use and very effective, I really like the looks of those ram snares that use the conibear springs to jerk tight, supposed to be fast killers and you can get away with much smaller wire, even heavy 300lb monofiliment fishing line.