IMHO, "offroad" does indeed need a specific definition appropriate in a non-expedition 2X4/4X4 small Class A, large Class B, and small Class C offoad forum context.
With respect to our small Class C motorhome - and since so few folks take them offroad for any definition of the term - I consider "offroad" for our rig to be:
- Driving on a soft surface road,
WITH
- a smooth surface
OR
- a washboard surface
OR
- a rutted surface
AND/OR
- a tipped surface
AND/OR
- a surface with inclines and declines
AND/OR
- a rocky surface
AND/OR
- a surface with occasional dips from flash flooding
AND/OR
- a surface with areas that can be rendered temporarily impassable after a flash flood
AND/OR
- a surface passing by occasional rock overhangs that may be concern for motorhome heights greater than 11 feet
AND/OR
- a surface passing by occasional trees with overhanging limbs that may required pruning on the spot in order to proceed
AND/OR
- a surface with a width such that passing another vehicle on it may require driving onto existing or non-existent road shoulders.
We have taken our motorhome on roads with most of the above characteristics (not all on the same road at the same time!) in order to get to specific areas for general exploring, hiking, rockhounding, ghost town hunting, photography, bird watching, fishing, and of course for just plain drycamping. These are similar to what the TC folks do with their rigs, but just a bit more mild.