For the trip, shipping was slowed by the protests last week, so the fridge, grill, and chairs I had planned to have for the weekend all came after we left on Saturday. That's a bummer, but the woods were still there and a good time was had by all.
Trax mount using the standard roof bars. You'll want Yakima part 23H. It's out of print, but can still be found occasionally. Just run a four inch bolt up thru, with a nut to hold the mount tight, and then one of those plastic knobs that are used for tool adjustments on top of a fender washer. I used 1/2" copper pipe as a sleeve for the trax. I had previously built this on a vertical mount for my rear rack, so 30 min of fiddling and the trax were roof bound.
We used two of these water containers (WaterBrick), and they worked out great. They are easy to stack, easy to carry, easy to use. Most important, no leaks. I like that they're completely rectangular, and strong enough to put other items on top easily. They also tend to fit nicely in the floorboard area or seats, though we didn't put them there on this trip.
WaterBrick Stackable Water Containers and Food Storage Container: 3.5 Gallons of Liquids or up to 27 Pounds (264 Adult Servings) of Dry Foods. Made of rugged, high density polyethylene (HDPE) with an easy grip comfort handle. These unique water containers, unlike any other, can also hold food...
www.waterbrick.org
Most of my trips are backpacking focused, so having the car camping luxuries was very interesting, and we were not at all prepared for the containing all the many small things with load management. Too many bags and duffels, not enough containers and boxes to hold them.