Nice trail rig, but let's talk sense. It had to cost some "$$$$$" to get it where it's at, right? Now you want to make it an expedition rig and avoid spending "$$$$$"? I never owned a 4runner, but I hear that stock, they're lacking the sturdiness & room that you need for an expedition rig. Yours is beefed up for being a trail rig, which is only part of what is needed for an expedition rig. You need dependability, & also need good storage, and compliance with all regulations to make it street legal and this may be the most expensive part if it's been modified, being that it's currently a trailer queen/trail rig. You'll want an aux fuel tank and aux lighting both front and rear. Navigation aids (GPS) and radios (CB, Ham or otherwise) will be very useful. One other thing, the amount of people & gear you carry, plus the length of trip both in miles and time, greatly determine the worthiness of your expedition vehicle. Expeditions come in all sizes. Food for thought - Good luck with what you decide!