the Silo tour is not on wednesdays but we should be there on tuesday. is the AFB bus tour different to the Silo tour since i though we could go directly to the Minuteman silo tour.
as for Devils tower & Crazy Horse we will have to make a last minute decision since both involve a fair bit of walking and with mount Rushmore which we are going dont know if the kids will enjoy similar type outings . If there is a scenic route we would prefer that.