I have a bolt on(4 bolts), trailing arm, soft riding suspension. When I first built it I had no welder, only a hack-saw, and grade 8 bolts, and some big C-channel for a frame. It grew a few years later, when I had a welder, and need for more room. It's only really good to about 1500 pounds gross on a long trip, tho' I've loaded 2300 pounds palletized flooring on it once. It is inexpensive, and you can get parts easily, tho' mine has been trouble free for over 15 years, and at least one 15,000 mile trip.
It's a Subaru 2wd Station wagon suspension, early 80's era. A lot like the VW suspension mentioned earlier in the thread.
My trailer is not a Teardrop, but could be made into one, if my wife didn't hate small spaces. The Deck on it is about 6'x8'.
It's light too - less than 300 for the frame, axles, tires, shocks. I tipped it on it's side for the underside shot with one hand.
As you can see - gobs of clearance. And it handles a load. I participated in a trail clean up and hauled a subaru wagon carcass out. It was lifting the hitch UP so transferring weight from the tow rig to the trailer. Easily 1000 pounds on the axle with all the mud and gravel that was washed into it.
I posted up on the Expedition board in their trailer section - but not much response. Maybe this forum, with the more homebuilt style, will be more interested
Here's the box I built to travel from Alaska to Washington D.C. and back with my family of 5 (we tented out of it and our AWD Aerostar).
The trails I have towed it on are no joke - I've hauled it loaded with logs across downed trees, and under water loaded with junk.
Sometimes I use my big Suzuki to haul stuff, not just the little one
PaulC - I hear you on the "KISS" idea of leaves - but for a counterpoint I've seen leaf suspensions break too - and I've seen too-heavy suspensions beat the heck out of trailers, especially campers, with stuff like post/pans/lanterns/stoves taking a beating to the point stuff starts to break, while a smooth riding trailing arm might keep things together longer.
The Lone Wolf Expedition was a good example:
( and a heck of an interesting ready if it's new to ya
- he really traveled some miles in some really remote places - and multiple times he broke the heavy leaf suspension on his trailer - and he was not a self-fixer, spending quite a bit of time and effort hunting down welding/repairs in Pakistan and Thailand(or was it Laos? whatever) . I kept wondering if a well built, softer suspension might have held up better - my own experience would say "yes".
Oh - and sorry to barge in without an intro - I've like Teardrops "forever", and have lurked here once in awhile in the past ( I didn't see the offroad trailer section then
) but ....my wife ....small spaces....lol