I've not done one of these yet, but I'm going to for Christmas this year.
Only thing I'll suggest is that defrosting that thing is gonna take some time if it's just put in the fridge. You may need to put it in the sink here and there and keep a continuous stream of COLD water going to help it along. Just put it in a pot in the sink and keep a nice continuous stream of water going into the pot to keep the water moving and cold. This is the method accepted by SafeServ for thawing food other than just by means of letting it sit in the fridge. I know a 16 lb turkey will take a week to thaw through in the fridge. I'd think a solid chunk o ham will take at least that long. Just sitting it out on the counter is NOT recommended.
18.5", 22.5" OTS
Large BGE (chambersuac's)
The Fiery Furnace (chambersuac's)
Big JT's Smokin' BBQ Competition Team