Thanks for all the advice guys. The needles are still on the trees, but they are mostly brown and dying. I've never seen a pine recover after it gets that bad. The only experience I have with a chainsaw was from a really big water oak in my yard after hurricane Ike a few years ago. My "nice" neighbor volunteered to help me get rid of it because it fell from his yard. He ended up helping me cut up all the limbs that were suitable for firewood (for his fireplace) and leaving me to deal with all the big stuff alone. By the time I figured out he wasn't coming back, the tree was pretty dead. So I bought a chainsaw and that's when I discovered dead wood is harder to cut than the green stuff.
Actually I do have another option. It will involve some work, but I can move my stuff (no permanent structures) out of harm's way and just let them rot and fall. I didn't want to do that because it will take so long and I really like the location. Plus there's a good chance they will damage other trees around them on their random way down. I'm now leaning toward cutting a > in the direction I want them to fall and then cutting from the other side. How deep should the > be? I'm thinking 1/4 to 1/3 in. Probably move my stuff anyway even if I do try cutting them down.