Tony, OMG, Such tragic losses - worse than tragic. We suffered a dog attack kill back in the mid 1990s, which resulted in us fencing all of our pastures in field fence all the way to the ground, five foot high with barb wire on the top plus woven gates also to the ground- ..............and the dogs will always return - always - when the dogs returned back to our farm - we were waiting for them with our rifles and permission from animal control to shoot them. Unfortunately we never found their owners - animal control said it appeared they were stray dogs - dropped off and they formed a pack
I'm so, so, so very sorry for your losses and pray that those on the deer stands will not miss.
Edited: I shared your horrible tragedy with my husband, he said he recommends those on the stand use a 22-250 rifle as it is deadly accurate with a scope at around a 1000+ feet, it is actually designed as a long distance "varmit" gun. A google search will show several models that are available and their benefits/range. This is the gun that we now use as our land is long and flat. During our search for the dogs that attacked our lifestock, you could see them way off in the distance - however the existing rifles we had at the time, were not as effective. A neighbor loaned him his 22-250 and that is what we used and it was effective. I wish you were closer to us - I would gladly bring over our rifles, tree stands and a group of hunters.