'72 Scamp Can I just fix the front brakes to get it home?

Any car that's been sitting 25 years is going to need all of the wheel cylinders, rubber hoses, and master cylinder replaced. Been there, done that.
I get that you're in Montana, lots of open space, etc.
Save yourself and potentially someone else a tremendous amount of grief and get a tow truck or a buddy with a trailer.
It's just not worth the risk.