J:
I am not a lawyer, but I think it is likely any liability legislation that will be passed won't cover them. Here in NM, we were able to pass a RUS (recreational use statute), but it specifies non-commercial use. If his strip was here in NM and he had customers using it and then staying at his cabins or using his services, I don't think he would be covered.
However, RAF negotiated a blanket insurance policy price for airstrip owners of $1,000 (apr price, maybe a little less) per strip per year. That doesn't seem too unreasonable to me and then he would be covered. We have an owner here in NM that uses that insurance and was pleased with the rate.
La Garita is a wonderful place and I hope you guys work with him to see if something can be done. Perhaps the Colorado Pilot's Group would work with him to kick in a little to cover the costs. Bet if you had a flyin there, you could pass the hat and cover quite a bit of that cost??
Thanks for letting us know about this and if you need any help with this, don't hesitate to contact me.
Good luck, L