I found that you should "suspect" a lot. Beginning with what you found, that everyone there is gonna be coming from a different place.
The best ones I've found over the years are those that have a "facilitator" with some experience in facilitating who doesn't mind stopping discussions that get out-of-hand or dribble around on the same two feet of space for two hours.
Lots of advice. Try to judge that by the things the person who's saying it also says about themselves and their lives. Lots of advice I've heard at them comes basically from cross-dressers who have studied a lot, but live generally male-lives and dress for groups and "special occasions" the Lions Club Xmas Gala where they are in a group that does drag, for instance. Try to check out what is said as far as you can with others you trust and you know have a bit of time actually living a woman's life.
If you are going for companionship and to ease the sense that you are all alone, then you'll probably get some truly excellent support. It's not easy just groping around in the dark all by yourself. Get a feel for the people and accept what you feel you need and let the rest go. Kinda like any support group that way from AA to OA.
And, most important, enjoy yourself!

Nichole