A few years ago I attended First Event (outside of Boston), I just drove down for one day. It was OK, but I didn't feel all that comfortable, there wasn't a diverse mix, it seemed to be mostly M2F. From what I understand, that has changed recently. I didn't make it down this year. I don't have the finances to go to these things for the whole weekend, and it's a 2+ hour drive each way from where I live, so it's hard to get motivated to go.
I attended Camp Trans (outside the gates of MWMF) about a dozen years ago. It was a wonderful mix of TS, TG, CD, IS, M2F, F2M, neither, and every imaginable place in between. Leslie Feinberg was the guest speaker. I had a wonderful time.
zythyra