Camp Chef guy here, too. I have the DLX and the XXL. Love them both and at some point you're going to find yourself looking at the Sidekick. It comes with the flattop griddle and I have the pizza oven, too. I bought the BBQ box, but it's still brand new and unused because the wife insisted on a big gasser so the Weber sits next to the pellet grill. I really like Lumberjack pellets, too and you can get them from Dick's or better yet, Cabela's pellets are made by Lumberjack, including some blends that are exclusive to Cabela's. They're like $10/bag and free shipping on a $50 order.
Camp Chef's pellets are ok, too. I have a few bags of their Competition Blend that I \'ve had good success with.
If you're really worried about the extreme moisture in your area, you probably should consider emptying the hopper and clearing the auger during long periods of inactivity. I will say that I keep mine locked and loaded under a cover year-round in the northeast and I haven't had a problem through snowy winters and wet springs but I'm always worried that one day I'll be cleaning a load of wet sawdust out if it after the weather breaks.