Probably way more than what most would need, but my wife and I traveled for multiple years working out of our 25' Travel Trailer. Much like Monteryman said, it was the equivalent of bringing your apartment with you to a shoot.
For one, towing it with the truck, most of our gear rode in the bed of the truck in Pelican Boxes and the bed was covered with a A.R.E. DCU Cap. It kept the truck looking like a work truck and is very lockable so I was never worried about the gear and it didn't draw too much attention. If I was in the city on a shoot, I usually threw a 6' ladder on the roof rack and most would think it was a work truck.
The roof of the A.R.E. had an aluminum rack that came from the factory. I brought it to a welders and had them weld some extra supports up there, then put expanded metal so the entire top was a platform to shoot from.
My wife shooting from the roof while in New Orleans in one of the Cemeteries
The roof of the camper was also walkable, so we could get up there and really get a good vantage point when need be.
When on location, we could stay almost indefinitely in the camper and live or work on the computers while we waited for the weather to cooperate. We had 3 solar panels on the roof of the camper that powered 4 AGM batteries. Also had a 2000watt Pure sinewave inverter so we could run hard drives and laptops without having to worry about anything getting fried.
I brought the camper to one shoot where we had a model with us, and it worked great for her to have a full bathroom, a bedroom to use as a changing room and my wife kept drinks and snacks going in the kitchen to keep everyone from getting grumpy. The camper has an upgraded 10 cubic foot refrigerator so it can hold lots of food and drinks. My wife and I lived out of it for 4 years straight, so it's way more than just a mobile studio, it can be a full house on wheels or simply a basecamp to leave back at the trail head.
So like I said, this is probably way overboard, but if you're looking for the Perfect Photography Rig, tow a small camper with a 4x4 truck, and there are few places you cant go. Plus, there are so many campers on Craigslist for give-away prices, right now is the time to jump if you're going that direction.
Here it is set up at a rodeo where we worked for a week as the event photographers. No power available, so without the solar panels and wind turbine, we'd have been screwed. Plus between events, we'd race back to the camper, swap out the batteries for fresh ones, change out gear depending on what was needed for the next event, grab a bite to eat and upload some shots to Facebook for the event organizers. They were amazed that we could do all of this from our camper, without power supplied to us and keep up with a rodeo that basically runs from sun up to well past sun down.
Might not be perfect for everyone, but it works great for us!
