Welcome to the forum, Jarrod!
Are you going to be towing, offroading, hitting the beach, desert, mountains? Each has its own unique requirements. You might want a combination, and need to get a spare set of rims for mud tyres as well as some all-terrains to handle road + sand. Sand is going to require a decent compressor and even dirt/rock offroading could use a small pressure drop in the tyres to make the ride a little smoother.
Towing heavy stuff means a decent hitch - insist on Hayman Reese, not the Nissan-branded one - and a decent proportional brake controller. A reversing camera is another often-overlooked item, it helps you line the towball up.
We opted for rubber mats inside so that dirt and stuff didn't ruin the carpet. Tinted windows really helped during our summer, where we travelled up from Mildura to Broken Hill and then east.
We also found a canopy with lift-up windows has been an absolute blessing. I'd hate to think how difficult things would be with a hard lid or how much stuff could go missing with a soft cover.
The headlights on the '09 model aren't fantastic, so we added some IPF driving lights. I should have gotten the round ones, and should have bought them aftermarket because Nissan's ones have 100W globes in and the others are 130W. You might like Lightforces instead, or Hellas.
Anyway, I better leave some stuff for the other guys to talk about!