They won't be able to make any noise though without risking a slap or being thrown out, the majority will have to sit there and do no more than politely clap, so not a problem.
Notts have been fighting for home advantage all season, it would be stupid to give that up that now. I'd never want to see no away fans, but a full stand or giving up your largest stand behind a goal in a game of this magnitude is just dumb.