I built a very nice CG Extra as a gift to an old friend. He drove down from Oregon to pick it up. The plane was worth the trip. I took him out to the Lake Bed for the maiden. After I flew it I handed it off to him and the first three flights all he did was shoot touch and goes, no stunts at all?? I asked him about it and he just smiled at me and said you have to be able to land them before you fly them!! That was good advise.
I have flown at events with noise restrictions and never had a problem but I have seen/heard several. Usually in the giant scales. Different brands of props in the same size can create a lot of noise, even props of the same size and make can be different. Last year a fellow came out to the lake bed with a 42% Extra that he installed new cans on. Loud doesn't begin to describe it!! After two flights he changed props, same size, different make and the plane wasn't loud at all. The sonic boom from the first prop was ear shattering!!
There is one field here that noise is a problem but I never go across town to fly. I do go there for events but just to watch. Homes have encroached upon it so they have to really watch it!
Gene