Thank you so much Trails for the suggestions! I actually went camping near Whoop-Em-Up last month but I didn't take the horses or get a good look at it. It looks like an awesome place to ride. I love to ride in the mountain and forests. :)
I've been to Bruneau Sand Dunes before but once again have never taken my horses. I've heard awesome things about it.
And thanks for the link. Gives me awesome ideas. Have you ever been to Eagle Island State Park?