Jeez, isn't there a law against road hunting where you are? (Which I gather is Pennsylvania.)
I've spent far too much time reading this thread but it shows up some interesting differences between American and Canadian property law.
Trespassing: in Ontario, in order for someone to be trespassing, either the land must be posted and/or fenced, or the owner or legal tenant of the property must have instructed them to leave, and been disobeyed. It's kind of a chilling thought that as an innocent hiker who has crossed no visible line, someone can jump you and arrest you without warning...
Also the laws are quite specific about how far from a residence hunters must be. I believe it's 100 yards. Hunting from a vehicle, or from a public road, is strictly prohibited. (The conservation officers sometimes put up a dummy deer in a field near a road, then hide nearby until some doy-oi blasts it).
Our comprehensive firearms laws are very specific about handling, storage and transportation of firearms, in or out of hunting season. Most gun owners hate that, but it has tended to make most of them commendably careful. Works for me. The cops are not shy to get involved in such matters--game wardens (conservation officers) are in extremely short supply, if firearms enforcement was entirely left to them, I bet we would be closer to your situation.
I've been living in deer country...well, all my adult life. Had very little trouble in the 20 years in our current location. Guess the yahoos are strangely absent--well we don't get too many New Jerseyites hereabouts, cept my wife. Instead, most of our Merican visitors are from Pennsylvania. I guess they hunt at home.
Never posted our streambanks against fishing...the trout have declined so much that it's not worth the trouble. You're right about the litter problem they (used to) bring with them though. It wasn't much compared to what we get on our 2000' of paved road frontage though. Beer fridges, you name it. One time somebody dumped a deer carcass, which they had already gutted, over the bank along the road. ???? Musta been wormy or something--anyway, THANKS YOU @#$%^&*(! ASSHOLE.