Thanks to everyone..it has been an interesting discussion for sure! Typically we spend a lot of time visiting National Mounuments, Parks and do a fair amount of hiking and exploring. This side trip to Mt. Rushmore via Custer SP was a spur of the moment idea. It is only a 3-4 hr drive from Douglas which is where our motorhome will be as it is enroute between several places that we will be visiting over a 2 1/2 month trip. We thought it might be fun to get in the car and just do a marathon road trip. Then back to our planned route on through Colorado, NM and AZ. Our dog could stay at a vet in Douglas but since we are headed out JUST FOR THE DAY...it would be nice to include him in the trip. So, thank you all for your input. We will consider it all.