there are more than a few posts on the intricacies of solar panels, storage batteries and power drains that will be of interest to you. Alaskans come with a three burner stove, some with an oven also. I think if you are committed to a propane tank then you should go with a 12-volt/propane fridge. Consumption of battery power is your problem for lighting and that 12-volt fridge once you get set up. You are at the mercy of cloud cover, trees, etc. shading the panels as well. The 12-volt system needs to be hooked to your truck 12-battery going down the happy highway so switching power sources is a necessity. Once in camp you can go to your charged up solar batteries. Or, you can get a 3-way fridge that will go 12-volt/120 volt and propane.
Your minimalist approach would still include a fresh water tank and a hand pump is all you need for that. Waste water dumps into a pail to be disposed of as required. I don't know your definition of a "big water tank" but the Alaskan is right behind the front wall down low and the hand pump on the sink worked just fine for us. (you can hook up to "city water" but your waste tank is still the issue!)
The awning can be McGuyver'd in many ways...drilling holes (water-letter-inners) in the camper to mount them can be avoided that way.
Make another list: pots, pans, plates, cups, flatware, soap/wash tub, condiments, BBQ stuff/briquettes/etc., chair(s) camera gear, sleeping bag, clothes, hats, medicine, jackets, whatever you think you might need and figure out the amount of space to carry it and how you carry it as it eats up space real fast.
The thing is, the longer you are out on trips, the less minimalist you get, you start to want to add to what you have on the list real fast!
Where I am going with this is simple....like building a ship, it has to be big enough to carry what you need to carry and then you need an engine big enough to power it or in our situation, a truck big enough to haul all that stuff around!
Think of putting together a camper/truck and the features both need and you want; its like a "Goldilocks" problem; one set up is too small, one is too big and one is just right. You want to gather all the info you can before plunking down your hard earned money and finding out you ain't got what ya need after a couple trips!
"A little more is better than a little less" when it comes to how much truck you need but first, how much camper do you need?