IMO, the stock suspension will be too soft for the weight of the FWC. At the very least I would add overload leaf springs in addition to having the air bags. If it were me, I would go with full upgraded suspension (front coilovers, rear shocks, and the overload leaf springs), This would...
In my truck camper shell I have 200 Ah of AGM sealed lead acid batteries charged by 200W solar upon top. The batteries were 1/3 the cost of lithium. My fridge is an ICECO JP40 40 liter with a Danfoss compressor. So far happy after using it a few times. I agree with earlier post...200W is the...