First time visit here and came here for a LEGO convention(Brick Fiesta). It's connected to a hotel next door(which I didn't use on this trip because I had other lodging accommodations.
The exhibit hall is fairly large and behind the corridor when you first enter. Women's bathrooms are on the front corner of the right hand wall, though I didn't look for the men's. I wouldn't say that the hall is as big as a major city's convention exhibit hall, but it suffices for a small town. There are other restrooms off to the left of the main entrance corridor that lies adjacent to the big exhibit hall, and a few more smaller rooms.
All in all, I think that this venue looks like it can accommodate a wedding with about 75-425 guests(depending on which room you have the party in the convention center.. It's not too far from the freeway, but if you have to get back on 635, it can be dangerous. You have to cross over 2-3 lanes to be in 1 of 2 turning lanes. read more