On another note, we will be able to get some of my buddies heavy equipment on site to help with the build. He's got a mini excavator that we will use to dig the hole for the outhouse and holes for whatever pier type foundation I decide to use.
He's already been out to the site and said getting his equipment out there won't be a problem.
If you can get heavy equipment to the site, can you get cement truck to it. If you can I would suggest a footings and frost wall to create a crawl space.
There's a big difference between running a tracked mini excavator down an RTV trail, and being able to drive a cement truck to the site. Not to mention closest cement trucks are likely a solid 2 hour drive, if not 3 hours each way.
Even if feasible, I'd look at what the increase in cost for building a crawl space (of limited benefit in a remote cabin IMHO) vs. spending the money on increasing the floor space of the cabin by building it longer or wider, a big benefit IMHO.