We got married last year, in a marquee, in a friend's garden in a suburban area. We had a ceilidh band and music played loudly through the PA with bass bins.
We went around the neighbours that we thought would be affected a week beforehand just to say what has happening and apologising in advance for any disruption.
Turns out nobody heard a thing as the marquee soaked up almost all the noise and the garden walls/plants dealt with the rest. The sound didn't travel at all. Noone lost any sleep - except us as we partied till 4am.
I wouldn't worry about it.