Sierra Nevada horseback trip

We are looking at the "Sierra Nevada Adventure", which is a horseback riding trip.     One is in the Muir Wilderness, the other in the Hoover wilderness.     We don't know whether the August trip, in the Muir Wilderness, might be very warm during the day, and don't know if one is more scenic than the other.      If you have been on one of these, we'd be very interested in your comments.  Thanks!