Who has which one and what are you running off your battery?
I would also like to know, I am thinking of going that route for my Echo.
Also not a fan of roll ups.. maybe good for some, survivor, you are mentioning big panels not suitable for camping, or maybe better word is not practical. You need to look at what else you need??
Just the oanel itself does not mean anything..
Just add another 100W if you can or look for something similar to a bookfold kit, which you can use when stationary. A vehicle charge system of around 30Ampshould help you a lot when overcast... you just need roughly 1hr to replace a good number of 8 to 10 hrs fridhe ime into the battery... once then sun is out, you can go with solar again..
You already have 2 large batteries. If you look at the correct stuff, you would be ok. I think we mostly only shop with our pockets than with practical mindset if it sould maybe cost more to do things properly?