I haven't purchased anything as of yet. That's why I can't give any type of figures except those based on current needs. I'll be expanding from wants to needs just having a trailer rather then sleeping in my truck when hunting ><.
The bigger question in my mind is how feasible it is to run Hybrid Solar inverter 2400w 24v 110v 80a MPPT solar charger 60a battery charger with only two panels.
That would depend on the size of the panels.
I have 6 100W on my TC roof, when the mini split is done it will be 8. Battery is 24V 280Ah. Out in the Dakotas we had no problem with power, I have a Dometic CFX95 replacing the back seat and ran a cord up from the camper when we are parked and run it thru the 24V to 12V buck. I could run it off 24V, but that is on the opposite side. I hard wired in a nice receptacle for the cord, another receptacle hardwired on the truck and it comes thru the truck rear cab. We did run the furnace each night for most of the trip. I turn the GW 3000SPF inverter off when we aren't using it, it charges the batteries with the inverter off. No TV to run, wife does blow dry her hair, and we never used the microwave that I can recall. Cooking is done on propane.
Where it will get you is on days with no sun and/or rain. Had 2 days with rain and no sun, battery got down to 75%. I have since added a 2400W 12VGiandel inverter in the back of the cab, seat is out for the Dometic CFX. I should take a photo of it. Ran 2/0 cable to it from my dual alternator setup of 355A. Used a new RV cord from the inverter to rear bumper where I installed a 30A RV receptacle. This allows me to "plug in" heading down the road and use the GW 120V charger. I've tested it this fall after I installed it, worked great. 60A I think I used for a charge rate. This also allows me to use the inverter in the truck for powering the camper if the GW was to fail.
I looked at DC to DC chargers, the biggest hurdle was 12V to 24V. You could find something like 30A in and 15A out or maybe 60A in and 30A out. I just figured why not just try this instead.
Obviously, going to neeed at least 300+ easily for each panel to fill a 24v 200ah bank which realistically isn't going to be filled @ 90% discharge. I normally love to tinker but I'm not drawn to do so when it comes to solar. The closest I'll come is a maybe on the batteries but chances are slim considering how cheap it is now to get them built. That said, ordering from China is still a possibility in my mind to do so.
All of that being said, I'm jealous that you have figured out more of how you wish to proceed than I have =)
It will depend on whether you're willing to charge off the truck. Heck the new Fords would allow you to plug the camper right into the truck inverter and charge your batteries that way, similar to my setup.
Location, shade, time of year all play into it. Whether you travel daily or sit parked for a week will make a difference too. I have half the array tilt so winter would not be such an issue. Too many people head south to AZ for the winter boondocking in the desert, then found the flat mounted PV couldn't put out enough watts to keep the batteries charged. Only so much real estate up top, make wise use of it.
As for panel selection, I used the Renogy 100W panels simply because 4 of them side by side fit just perfect. I have enough room for 4 more on an elevated mount plus a pair of 50W on each side on the front skylight. The 50W VOC is actually close to the 100W. Measure up your roof, lay it out on a piece of paper with all the obstacles and see what might fit. I've seen many add an elevated platform and store extra gear under the panels.