At the marina, unless you want to get tied up in a discussion that will last for hours and hear some of the craziest opinions...
OK, pumpkins (from my farm) are provided to the divers that pay their money ($20) when they get to the site to dive. Last year I saw a fellow go in with a whole basket full of tools along with a sketch on the face of the pumpkin of what he was going to do.
No real need to call the Dive Shop, as it's usually a 'first come, first served' kind of deal, and they usually have pumpkins to spare. Good idea to bring along a couple loose weights, or a good sized stone to put in the pumpkin for ballast as they are naturally bouyant and this years pumpkins will be kind of large (I don't have any small ones to send along). You can usually find a buddy to dive with if you ask around as many of the divers are 'singles' who come in for the event. Warming tent is provided, along with hot coffee, and soup and things to eat. Prizes this year include a Scubapro Mk 25/S600 regulator!
I'll be there. Look for a black fullsize Dodge Ram pickup with a black "Nothing Runs Like a Deere" tag on the front. Or, look for the tallest fellow in the crowd, 6'-4" 260lbs, very short grey hair, glasses, black and blue Viking Xtreme drysuit, with a black tank on a black packplate rig. Be sure to introduce yourself, I'm always happy to meet friends from the Scubaboard! I'll probably bring both my tanks and make two dives if someone needs a buddy after I've cut mine.
Look forward to meeting a couple of you!