We loved our Jayco 23b. Had a small issue with tent end door leak but jayco was excellent to deal with in resolving the problem. We had no other issues. Have no info on the Kodiak other than some negative feedback on here about Thor and their warranty support. We did make the drive to get the unit/options we wanted and had no regrets.
^^^ Ditto! Bought a used Jayco and they have been very pleasant to work with. Drove 6 hours to get mine. If you are set on a certain camper, don't let some miles stop you. You will have the camper for years to come and it will be worth it everytime you camp!
I have no history with Kodiak, but I am more than pleased with Jayco.
Looks like an awesome trip! No darts, but a few thoughts.
For me, I would tweek a bit, as I am not as fond of the Black Hills area as I am w/ Glacier,Yellowstone and GTNP. So, I would add a few days to GT, and a few days to each side of Glacier. I am with 4runnerguy as far as liking the East side best, but both are wonderful.