My recommendation based on personal experience is to buy the largest rigid solar panel that will fit on your camper or trailer, ideally 360 or more watts, coupled with a Victron (or equivalent) solar controller and battery monitor and a 100Ah or larger lithium ion house battery. A single large solar panel is cheaper, lighter weight and less expensive than any combination of small rigid panels. I recommend rigid panels because to date they have proven much more robust and longer lived than semi-flexible panels. I have read recent reports that one or more of the newer semi-rigid panels will last many years but frankly there is little data I have seen to support that assertion.
Our camper was electrically disconnected from the truck while I was installing a Blue Sea ACR between the truck AGM starting battery and the camper dual 6v AGM deep cycle battery bank.
However, the 360w solar panel on our camper has kept the camper house battery from dropping below 50% for years , even during long multi week trips, so I never completed the truck to camper connection.
The caveat is that we do not exclusively camp in dispersed sites so we do get periodic ability to recharge from shore power.
I bought and have never had to use a Honda 2200i generator. I quit carrying it. All the wiring for the ACR is in place, so I do have the ability to connect the truck and camper battery bank together should I need to jump the truck battery or to recharge the camper house battery bank.
If you have a newer truck and a lithium ion battery then I recommend a Victron (or equivalent) DC-DC charger between the truck battery and camper house battery bank.
I recommend doing the Solar system before deciding that you need a portable, space needing generator.
A well designed solar and storage battery system should preclude the need for a generator of any kind (indeed, it is an electrical generator - just size it appropriately for your needs).
I hope this is helpful,
Craig