I've always enjoyed long drives and have made numerous trips from PA to Montana (~4500 total miles, including miles in Montana) spending 3 days each way on the road driving solo, but I generally allow for more than 10 days for the overall trip. With multiple drivers, piece of cake. But only those making the trip can really determine if 6 days on the road for 4 days on site is worth it. From past experience I will say the drive out is not a problem as anticipation keeps you going. The drive back you just want to get home and that is the one that takes its toll.
