super wet locations, frost heave and further questions

Hi, I'm new but SUPER excited to find other earthbag fanatics!
so, for about 11 years I have been planning to build an earthbag shelter when I bought land (hahaha!) Then I bought the land. Its a VERY wet 15 acres on the side of 2 mountains. and the frost line is somewhere between 6-8 feet!!! We couldn't even get down 4 feet without equipment ( which will be more-feezable this summer, compared to last) I immediately panicked and started looking at other options, like frostproof shallow foundations, as of now this is the solution that settled my panic. HOWEVER, I would love to hear input from people who have done this.  Does the wetness make earthbags a no-go? am I looking at going down a full 6-8 feet with earthbags? Are earthbags still a viable option on a frost-proof shallow foundation? Any suggestions are welcome, except for the treehouse brigade, we aren't going up yet.