Thanks for your responses. I understand what everyone is saying. I know my family though and we aren't the type to sit at a campground for a week. When we say sightseeing.... we are talking about going to Kennedy Space Center, kids want to see the Space Needle in Seattle, going to the Carlsbad Caverns, San Diego Zoo, and other places. The kids were very much a part of the planning and that is why some of these things such as Seattle have made it to our list.
We were trying to find a balance between the national parks and seeing some new to us cities. We are planning stays in some state parks in some of the stop overs such as Catalina SP in Tucson, Dead Horse SP in Moab and Gulf State Park in Gulf Shores. We will also take a break from the RV in Vegas and stay at Circus Circus.
We had hoped for more time in Yosemite but when the reservation window opened we were only able to get one night. We are still debating if we should make the stop on our way to San Francisco or just bypass and move onto to SF so that we can add another day in possibly Glacier or Moab as many have mentioned.
If any have suggestions of ways to make slight changes to itinerary(alternate routes) so that we could add a day or two more to Moab, a day for Glacier we would love your suggestions.
We do realize that some of the stretches a driving are long. We are young and frequent road travels. I am used to driving 9-15 hours pulling a 48 ft trailer with a Topkick 6 times a year over the course of usually 3-4 days turnaround for racing. It's not fun and we wouldn't want to do it everyday but we figured we could handle a few longer stretches here and there to see more of the country.
Thanks again for all your input!