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.