Great list. May I also suggest Mardingtop backpacks? They really have some highly capable backpacks at a very reasonable price (integral molle and most have rain flies built in). The reviews speak for themselves. They're also available in a wide variety of colors.

https://us.amazon.com/s?k=mardingtop+backpack&ref=nb_sb_noss_2

For a much more affordable solar option, BigBlue makes an excellent 63 watt folding unit that can fit in a pack. It doesn't have its own stand, but it does have loops and you can easily make a PVC frame that will break down to fit inside a backpack. Just use velcro cable ties to attach it. I found it can fast charge a Google Pixel 4 XL about as fast as a wall charger.

https://www.amazon.com/gp/product/B07CG7WZ7Q/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Photo of the unit on the frame I constructed. Just cheap 1/2" Schedule 40 PVC.