Matt, I don't have any advice to offer as all the weddings other than one I got hammered. And the one I was sober at, as soon as the dancing started, I just got an uber and got out of there. Was about 2 hours from New York City. As bad as that night was, it still wasn't as bad as the weddings I've been at where I woke up the next day with little recollection of the end of it.
I have a bachelor party next weekend (my brothers) then a weekend off for Memorial Day and then back to back weekends with weddings out of town that I'm absolutely dreading going to.
Let me know how your night goes. I know it's possible to stay sober. Weddings are definitely a lot harder since the expectation is certainly to drink and the two I'm going to coming up will be a challenge.