you need to consider freezing temps in regards to both your battery and water if you plan to use your Van for skiing...
also, plan around half of your solar panel rated output in regards to real world use...
I mounted the heavier stuff low so that a straight on collision would have the seat bases and backs between us and the projectiles. but not much protection if we roll over and hit something hard.
Standard "comfort" seats, not swivels, so I would expect them to at least slow the velocity of projectiles.
Random update. We've been out a few times this winter as well as a cross country trip for Christmas. It was great to be able to quarantine for 2 weeks at home before driving then never go inside a store on our way to see my wife's parents. No Covid came with us! Sleeping in truck stops was a new experience too. My dog was not excited about 2 days in the van though and would steal our seats every time we stopped! As for winter camping, we've had a couple of really cold nights. When it hit 10* overnight the Espar ran all night, the lowest it got was 58* inside. We did have it set to 62*.
Right now the garage is still opened up to the front cabin which keeps the battery warm enough but I do intend on adding a simple battery heater, been toying with some motorcycle grip heaters that are readily available and inexpensive just to keep a little heat on the battery when necessary.
I didn't hook the B2B up for a while so we could see how the one 100ah battery served our needs with 200 amps solar. In the dead of winter, it's just not enough. We generally dipped by 25-30% each day/night with lights, fridge, sink, and heater then only recovered 15-20% (and that was on a good sunny day). So for a weekend trip, that's fine but any more than a couple of nights we would need a boost. I now have the B2B hooked up and so far don't think we will have any need for a second battery.
A few more pictures to add because I've added the cabinets, finished the countertops (minus adding a cooktop, happening this weekend), finished the water system (I do need to add an inline switch still instead of pulling the fuse when we're not using it), and started looking towards some finishing details!
All the cabinets, while not perfect I did want to address the strength somewhat. In a major crash though it's just a risk we're going to accept. Each cabinet box, 3 in total, I've added vertical and horizontal supports to the box structure with 5/8" plywood. Is that thick/strong enough, probably not but it's stronger than just attaching the box to the van. Each of the supports corresponds with 5/16" cross nuts in both the side of the van and the floor attachment where the cabinets are attached. Eventually, they will all be attached to each other once I close off the garage, creating a somewhat solid structure also attached to the bed frame. My fridge is probably the biggest risk I have in a collision right now as it's attached on the sides to the cabinet box. I'm considering some sort of strap at the rear to bolt it down to through the floor on both sides so it has less of a chance of being a missile.
Anyway, I love this van. I wish I bought one sooner. We're heading out on a week-long powder chasing trip next month so we will see where we end up!