We signed up for a SMART (military camping group) Caravan - there weren't enough for an official group but the Caravan Leader offered to take the group. We started with 13 but 3 left due to communication issues. There were times we wished we were on our own to decide to stay somewhere a few extra days or not to stay at a certain campground. However, there were 3 rigs that ended up with problems that were greatly helped by having someone else to help solve the issues.
We also had a good time with potlucks and having fun with trips to breweries and wineries and touring and fishing with friends.
We left from Great Falls, Montana and returned to Washington State.
It was a once in a lifetime trip for us and we think the Caravan was best for helping us to enjoy it. Get a Milepost Book (used is fine) to start planning.