We have the same problem here. Lots of private land in between the public land. In Colorado they don't need to mark it either. It's up to the hunter/fisherman to know where the private land is.
The game knows where they're safe too, and will go on the private land to get away from the hunters.
It's not as easy to get elk here as out of state hunters think. Only 20% get elk here, and you only have a week to do it.
I hunted Mass for many years with all the problems you mention. I never hunted in a tree or blind with or without bait. If I lived in an area that I could only do that. I'd move.
Well, I did move. To Colorado. I came here to hunt and fish. Too bad it's so hard to get an elk tag here. I should be able to hunt my own state, but that's not the case.