If you plan to do LONG days of driving, then you will be able to have about 8 good days to see whatever you want to see, but for many of those places, that's only skimming the surface. From NJ to Moab (just used that as an example), it is a 32 hour drive, not figuring in traffic. That is three good driving days of about 12 hours since you have to eat and go to the bathroom. You will need to leave about 5 am in order to get to the next camping spot during daylight hours since this is a new RV. Remember, this will be winter when it gets daylight late and dark early.
If you were going to do it in the late spring or even early fall, the daylight/darkness driving might not be a bad thing, but you also never know what type of weather you are going to run into. You will be driving through the major winter storm areas and December and early January are prime times for those.
I'm honestly not sure if two weeks are enough time to head that far, but it is according to how badly you want to go, I guess. I would opt for heading for warm weather down south, maybe heading toward Texas. That would be doable for a two week trip.
Just my $.02 worth.
2017 Ford F350 Crew Cab 6.7L 4x4 DRW