I've got the idea I would like to recumbent trike the dormant logging roads found in western Washington state. These would be gravel and some dirt with typically big potholes, the occasional minor washout, and a branch (or tree) laying across the road.
I'm wondering if any recumbent trike could handle being slowly driven over a four-inch diameter branch.
Right now, I'm leaning towards the Catrike Villager. http://www.catrike.com/villager.htm
Compared to the Catrike Expedition (http://www.catrike.com/expedition.htm), it's more maneuverable and has more ground clearance.
Obviously, the published 5.5" clearance of the Villager is frame clearance. Looks like the low-hanging chain would be inviting damage to the rear derailleur. I'm thinking a Rohloff internally geared hub would minimize the problem (no derailleur cage). In that case, I might be better off with a custom-built Greenspeed. Also, there is no front derailleur post on the Villager (a Schlumpf could be installed, I suppose).
I don't think I'll be camping, so luggage capacity is of secondary importance. However, I do like the idea of being able to tow a BOB or Burley trailer.
Edit: The ICE Trice T looks pretty cool--7 inches of ground clearance. http://www.ice.hpv.co.uk/trikes/t.htm
A Rohloff will mount to it but the site goes into some reasons why they don't offer it. One thing I hadn't considered: the twist grip shifter needs to be mounted at the end of the handlebar, sending the cables up into the air. I guess the twisting torque is more than the little fingers can handle.
Rigid Trice T with 26" rear wheel: http://www.ice.hpv.co.uk/trikes/t26.htm
ICE doesn't seem to have a strong marketing presence in the US.