First thing if you haven't already, baseline all the fluids and service to make sure when you do go back-country that you're confident that it will get you back. How's the battery? Original? Time to replace it.
You are close to some of the best country on the planet, so much to do from soft-roading to hard-core. Decide what you and tourbwife can enjoy together and take the car there one mod at a time. Enjoy as you go. And keep your fj in good shape, it'll hold its value for a long time since they're not making them anymore.
G'luck, Dan.