Can you be sponsored by active duty base personnel? I was stationed there in the 1980's but not retired.

You still have to dod res. Mil. That's the rules.if i could help you i would.

Or call the camp host directly at 406-731-5140

It is outside of the base so i don't think you need a pass.

Yes

I have no idea. I would suggest you call Outdoor Recreation on base and ask.