I've been looking at different travel trailers and one thing I'm looking for but haven't seen much of are models that would support an office area. I don't need much, primarily room for my desk which ...
You indicated you were thinking of something on the smaller side. A small toy hauler would essentially give you a "room" to set up as needed. There are also some TTs that have a bedroom/den/office area, usually in the rear, but they tend to be larger size. Many toy haulers have a bed or sofa that can be lowered if you need it or not. Might want to check those out.