Our little hunting group is manic about cleaning up, and anyone who hunts with us in our "secret" spots is drilled on etiquette. We always carry 32 gallon black plastic trash bags in the truck for hulls, water bottles, cans, feathers, etc. We clean our birds over a bag and zip-tie everything for the trip out. We always leave the area cleaner than we found it, and it has paid off on several occasions when land owners and managers have rolled up to see who was hunting on their land. We now have permission to hunt a few spots that are off-limits to others, and it doesn't get much better than that. We only reload 28 gauge, and seldom find any hulls that are usable. The exception is opening day of dove season when the city boys come out with their popguns and leave their trash all over the place.