While in the USA in August we are considering hiring an RV, and touring around Eldorado NP, Yosemite and Sequoia. Im not 100% on the idea yet, not knowing where to stay etc. The idea is to stay mobile while staying in some nice locations. Im wondering if anyone has done something similar, or knows a bit about this sort of thing. The things that concern me, 1. Dump points, if not in caravan park etc is there any in roadside rest stops etc 2. Water, again if not in a park where would i get water etc for the RV. 3. Safety, is it safe enough to stay through the NP's in the USA in the campgrounds etc(i assume it would be?) The area around LOON LAKE in Eldorado for example looks very nice. Do these types of areas get busy? Thanks.