Dress for warm weather, it's always hotter in the East. LOL
Seriously, just remember you know it. I would advise having a prompter ready to aid you, because having a safety net always helps ease the nerves. Speak authortatively, the candidate will only realize you make a mistake if you clue them in to it. If you speak with confidence, they will have a good degree. I would also practice the obligation by chopping it up it like you are giving it to someone if you haven't practiced it like that. It's different with pauses, breaks and corrections. If you are used to practicing with certain people in your degree team, try to get as many of those as possible on the degree team that night.
And remember it will be your first, so it is going to be a little rough and you will probably make a mistake, as all worthy brothers have done before you. On my first one, I went blank on how to start the obligation. I didn't panic, looked over at my prompter, he gave me the first word, and it all came flooding back. You will do fine, your degree team will help you if needed. Although I've only conferred 3, this is the same advise I was given by two worthy brothers who between them have conferred somewhere around 1,200 total.