No idea about new solar tech, but nothing wrong with 10-5 year old tech and it is proven.
Meanwhile, in case you are new to TCs, you can carry more batteries. I just posted this earlier, so copied it here. You can carry two more batts on the passenger side too. Weight might be an issue if your truck is already struggling with the TC, but otherwise it works.
"With the 2003 truck same as yours and the TC we had, I carried two golf car batts in the bed driver's side up front. Had to stop the slide-in when the camper was by the wheel well to hook up the wiring, then slide in the rest of the way. Couldn't get at the batts once the camper was all the way in.
So you could do that plus still have your 27 in the camper. One of my set-ups was to have two 6s in parallel with one 12 for when camping. Separated at home between trips. Worked great.
Camper was off the truck most of the time, so the two 6s were off the truck too so we could use the truck for other jobs. Gives a chance to get at the batts for maintenance too (see the SG, and if need water)"