RE: Need some advice
Defianetly don't wait to talk with the land owner. Safety, should alway's be number one! Unfortunately there are alway's a few who have never learned this lesson. Unfortunately, the land owner know's this all to well, with the loss of her own son. You need to talk to her immediately, after all your own life is at stake here.
Secondly, this type of thing is so typical (annoying isn't it). The earlier posting of possibly leasing the land outright would be your best beat. (Still not a gurantee, on opening day this year, I had a trespasser come in and take a 6 point off the land some buddies and I lease. Didn't even have a tag to place on the deer. Go figure!) The hunter's insurance is a great idea as well. Some people are just plain and simple not ethical. It sound's as if unfortunately this younster never had any values, and respect of other hunter's instilled in him. Good luck, you have a situation here that could eventually upset the land owner enough, to where no hunting would be allowed if it get's any uglier.