C.S.
I see many kids a weddings and I am there often. I am a photographer and people bring them all the time, so long as it is okay with the bride and groom. Some would prefer not. They will crash at the wedding and if not, in the car. Just take a little blanket for them to lay on and one to throw over them in a corner. Hopefully it is not too crowded.
I wouldn't send them home with the hubby. That is a little night out for him too.
Otherwise, hire a sitter there. I think Nadia has that covered for you.
C.