We did a caravan to Alaska in 2009. Had a great adventure. No hassle of where to go, reservations and major itinerary items pre-planned for us. Had a grand time. Our Wagon master couple and tail gunners were all wonderful people and went above and beyond to make sure we had a good time. Downside, you are on a strict schedule and have to move when the caravan does.
We are currently considering another caravan in the same area you describe. We have been independent RVers for many years but may well decide to let someone ele worry about the details for another time. Cost is always high but stress is low as a result.
Good luck with your decision.