Have you spoken with anyone at South Pass City re: mine tours or tours of the city?
"The Final Carissa Mill Tour of the 2013 Season will be September 28th - Call for reservations - 307-332-3684"
Might be worth calling to see if they can arrange a special group tour otherwise it's looking like it will be locked up. Might bump my schedule a bit.
U4WDA, Wasatch Cruisers, TLCA, RR4W, Mountain Yoats 4x4