Lockers - I suspect you'll hit your limit far before you hit your trucks limit in terms of needing a locker, but if you decide to go down that road, definitely contact Ron Turner at Tulsa Truck. They put on my meritor front axle, and redid my rear when we stretched it out. I am 100% convinced (after much research) that there is nobody in this country who knows more about big truck axles than Ron's guys, and their incredibly professional to boot.
Based largely on what I'd read about your experience with Tulsa, I contacted Ron early on about doing a 4x4 conversion on a crew cab Isuzu when I was exploring that option (hoping to keep the wheelbase shorter with a cabover). He was extremely knowlegable and forthright. His candid opinion, combined with a few others, helped me come to peace with accepting the limitations, and advantages, of the traditional US cab/chassis configurations for what I was trying to accomplish. And I've decided to see how I do with the limited slip for now.
Hitch - since your trailer load is going to be light, and you're planning on taking it off-road, I'd definitely suggest the Lock-and-Roll (what I have) or even better the Max Coupler. Both can be sourced by Mario at Adventure Trailers, who knows more about off-road hitches than you or I will ever want to.
I just came back from the shop fabricating the trailer and put my hands on the pintel/lunette assembly they ordered in for me. I didn't need a slide rule to figure out that it is WAY overkill for what I'm doing. However, since the trailer frame now has a receiver, it will make it easy to swap out couplers as needed. I'll order up a Max Coupler, but probably hang onto the pintel in case I need to haul a howitzer somewhere (neighborhood avalanche control work?).
My biggest challenge with the trailer was just seeing it. The few times we took the AT behind the EcoRoamer it completely disapeared from my mirrors. Plus, the length is so short compared to your wheelbase, that it jacks VERY fast when reversing. It can be done, but takes some getting used to.
AMEN! Last fall I was pulling my 16' enclosed cargo trailer behind my 40' Funmover in Southern Utah, doing about 65mph. It came off my hitch, and rubbed away the safety chains. I had NO IDEA anything had happened until it decided to pull out from behind the rig and try to pass me! Fortunately, there was no oncoming traffic and it had the good sense to crash itself on the other side of the road while tipping onto its side. That's when I realized a winch would be handy! I actually think it was trying to get back at me for denting it up repeatedly with the safety lock plates of the Funmover's lift gate while pinching it trying to back up. It happened OFTEN, and I never heard or felt a thing.
Yes, the Funmover had a back-up camera. After several trailer mishaps, I made a habit of periordically monitoring the camera while pulling our boat on the highway, half expecting to see nothing but a trailer tongue and some tattered fiberglass hanging from the bow strap.
I'm hoping that a shorter, lighter rig will at least let me know when the damage is starting, rather than find out when I've stopped for gas.
Good luck & keep up the great progress!
Jay.
Thanks, and I trust your rig is back on the road?