These trucks are pretty darn capable right out of the box, especially with that rear locker. There's a lot of directions you can go with little mods and things to make the truck perform a bit nicer. Some of my favorites:
1 - Fridge. This does NOT have to be one of the super-duper fancy ARB, Engel, or National Luna fridges. They're great units, but several high quality fridges can be had for half the price. Indel-B (also known as Dometic or TruckFridge) can supply you with a really nice 40l fridge that has similar power consumption to the ARB/Engel fridge, and works just as well. The construction is very high quality. I personally have an Indel-B I got from Equipt. You can also pick up a Whynter/Edgestar fridge for even less money, down in the $400 range. They make pretty good fridges for the price, and there's lots of information about them and their performance all over ExPo.
2 - Air compressor. Even if you never do any heavy duty offroading, being able to air the tires down over washboards and crummy road conditions will go a long way towards retaining your sanity and improving your truck's longevity. When the road gets anything worse than a smooth gravel track, I drop to 25 PSI and it's smooth sailing.
3 - Lighting. If you travel through the backroads in any sort of wooded terrain at night, you know how dangerous deer, elk, or moose can be. Good auxiliary lighting can go a long way towards keeping you from accidentally smashing one. LED light bars are a good choice here because they send a really wide beam of light down the road, lighting up everything in the trees.
4- Suspension. I know you said you picked up a leveling kit, but something to consider, depending on how much extra stuff you're taking with you, is upgrading your rear suspension so it can handle more weight from extra gear. Some add-a-leafs and Bilstein 5100s are a good way to go here. They'll help your load capacity and smooth out the rear ride without blowing the bank on new springs.
Those things are the basic stuff I'd recommend looking at to improve your life of exploring. Obviously you can take it as far as you like, from simple and mild modifications to all-out crazy. Doing it your way is half the fun.
