I definitely appreciate all of the feedback you guys are giving us! At this point, I think it's safe to say we're not heading into Utah this trip (or Denver, KC, St. Louis)! We're going to look in making our 14 hour day a 12 hour day by stopping in Houston, then finishing the drive to Hamilton Pool in the morning. We aren't familiar with road trips to the West Coast, but we have traveled a ton on the east coast side. We know what 10-12 hour days feel like, and think (maybe naively) that we can handle a couple of those in a 3 week span (on top of multiple 8 hour days).
We ordering paper maps this weekend as well as printing off park maps to look more into the hours/days spent traveling. Soon I will post a rough draft itinerary so I can get some more feedback!
Thanks again all of the tips! Any more is always appreciated!