Looking for advice to do a trip with 2 kids in the spring. 4yr old and 2 yr old. Starting in las vegas bryce, salt lake, yellowstone, up and through tip of idaho, through oregon, down through cal. And over. Gonna be in a 31' motorhome and would like info on stops and places to see. Also times to go. Dates are flexible. Enkoy mountain biking nd water sports. Any info would help