We had a really great weekend in the Baltimore/Silverspring area, from Shabbos with my sister's family and many hours with other "relatives" to meeting some people for the first time to the wedding [which was awesome] to having a great ride back via Philadelphia and meeting some new people from KGH in the process.
Advice to the penny-pinching: When debating whether or not to bring a baby to a wedding, keep in mind that the people at your table who've never before met you seem to enjoy volunteering to hold and watch your baby for you. And playing with her. I think the people at our table took care of Elianna for a total of over an hour - it was really convenient. :)