Since we're going entirely 12v we'll need a bunch. Plus, in a 9 by 6 box it's a pain to have to move to plug something in
. Two are for the outside and two are for the dash, we dislike where the factory ones are, so six will be dispersed in the main living area. One for fridge, one for fan, one for small 150watt inverter when needed, one for MiFi amp when needed, laptop... Really we want to be able to move the fan around to get the best airflow so having more plugs should make that easier. Two of the dual USBs will be also going up front so we'll have four of those in the living area. We originally planned to have one outside but they say "dust proof" cap and not waterproof. It will live just inside the barn doors for the times it's nice enough to have them open.
Your van is looking good. Ours is looking naked and afraid. We've stripped her down to build her out and just sold the Renuel bumpers to a forum member, he can announce it when he's ready. We'll try and keep our build page updated since you know her well. She has a big appointment coming up!.
-John