Overnights are the Marmite of punting - some guys hate the idea but others love them.
I have done overnights with a regular (and got a good discount) and it was very much a GFE exercise.
Go out, have some drinks, clubbing, pop into a lap-dance club (she's bi), get something to eat or pick up a takeaway, and head back to hers.
Then it would be on with some porn and a private lap-dance (my regular is an ex-Spearmint Rhino girl) and then head to the bedroom for sex.
Then sleep in spoons, morning sex and shower together, breakfast in bed and then go home.
I know the standard objection to overnights is 'I won't pay a girl to sleep' but really you are not paying the girl to sleep - you are paying to sleep with her.
If that idea appeals, I would say go for it.