whew...more power to you. I couldnt imagine doing a humiliation/bondage session any longer for an hour, once a month. I've done about 4 humiliation sessions, and I dont advertise in it at all.
Also, be advised that there's alot of guys who mention stuff like that but are really just pulling your leg. Not all...and yes there's plenty out there with some true, fetish request but an all night for the 1st meet for a bondage session sounds...a bit too much.
In fact, if it was me I'd tell him I could do an hour or 2 first before I agree to something like that all night.