Yes, basically you have a stand-alone system being fed from the main facility. 10a at 120v is 1200w, so 29kwh each day of charging. You set the MPP to limit the AC charging to 10a which is nothing for 10-12awg wire even over long distance. You could also hook up a couple of panels to the controllers if you can find a way to mount them that does not kill the aesthetics of the yurts/ camp ground.
You will likely be producing more power than you can use during the day, so battery storage will be "sky's the limit". I would definitely set up the arrays so they are facing at least three different directions and angle them for best summer production if you are going to moth ball the facility for winter. You want the panels to start producing the second the sun is up and not stop until it is down. Since you are in Arizona, I would pay a visit to Santan Solar and see what they have. I like the 250w snail trail panels. They have gone up in price, but assuming you can haul them, $50 a piece is hard to beat. Run them 4S4P (4000w) x2 for each MPP 6548 and that would give you 16kwx6=96kwh. Heck even if you got half that you are looking at 50kwh production each day. If you need more, just add another MPP 6548 and two more arrays.
Maybe the best course of action would be to just leave yourself room for more than one battery. They are stackable, especially if you put them in the cute little enclosures they sell. Keep in mind you can also pull 1200w from the main facility through the AC in, so that would give you closer to 3kwh of power to play with and you can definitely pull more than 30a from those batteries, they just don't want you to do it continuously.
For the main building I would just go as many as you can afford. I would say at least six to start.
The nice thing about this is you can add as you go, so you don't have to get it all at once. Even if you just get one MPP 6548 for the main building to start, it will power your campsite off a couple of batteries and two arrays. $1600 for the MPP6548, $1600 for the panels (32x$50), $3000 for two batteries, $500 for the wiring/racking/etc. and you are in business.