Your profile doesn't state what kind of RV you have or how many batteries. I have 2 6v GC batteries, 60 gals of FW, and minimal electrical reqs, just water pump and lights no TV or stereo stuff. In 2006 I went to Alaska and dry camped for 3 mos stayed at 4-5 full hookups during that time. Never needed the genset other than MV and my electric chain saw, not for battery charging, had a 180 amp alternator and averaged 3 night stays in one place. If this is your first trip you probably want to see as much as possible so you will move often. The longest I ever dry camped in one spot was 7 days and still had 50% SOC on batteries but run out of FW. With 2 6v GC batteries you should be fine and will not need solar for this trip unless you want to watch TV, or special electrical reqs. Also what I learned from this trip and others over the years is every 7 days my wife needs do laundry anyways so an electric site with a laundry mat is convenient so you can fully charge your batteries, wash you clothes and bedding, dump and fill with FW and be on your way the next day to a more remote site.