Have never been. But have a good friend that has gone yearly. BM is more about a certain look on life an attitude... He has said it's evolving, and that the core spirit of BM has been threatened by it's own popularity. Seems that many who now come, come not for the BM itself - but more for the bragging rights of being able to say they're BM alumni. And in that group, are sometimes a few bad apples...
I'd like to attend a BM, and suspect I could be invited to attend my friends group. However the DW has a great dislike for dust. And after talking with my friend, I would not take out coach to the event. (Heck, he had a older well cared for Class C that had attended several BM's, when they were moving up to a Class A for retirement - they almost kept the Class C just for BM usage. When he sold it, on Craigslist, he advertised it as a veteran of BM, with extra modifications to help control the dust. But, admitted that the karma of dust from previous BM's would go along with the coach:)! No matter how many times they'd clean, they'd still find dust in new places from time to time:)!
Best to all,
Smitty