Just a little common sense will help you here. I would say to simply not hover during busy times like Saturday mornings and afternoons. Save it for less busy times. It hogs airspace near the runway and can cause midairs. I always wait until the airspace clears before I do any hovering. Just be considerate and you'll do fine. Also I wouldn't hover very close to me if other people are around as it endangers them (and myself). Why wait for people to make rules when you can simply use caution (and less rules will be necessary).