This advice is helpful, I think for this trip we are not so focused on what is between here and the parks, maybe if we have one or two major places in our route we will stop, but we will have one, maybe two drivers. My dad will do most of the driving and can do long days driving so i think our focus will be to get there "quickly" then spend our time at the three parks, Tenton, Yellowstone, and Glacier and then take a little bit slower coming home. We may do another trip for the GC and Cali and then a few more throughout the years to see whats all between here and there. I love traveling and can get time off work its just coordinating with the family so 4 weeks is all we have right now.