I remember seing one rig with a wood stove, they made the chimney foldable.
Basically, they cut the chimney off about 6 inches from the roof. They attached a flange and a hinge to the flange, and then did the same with a section of chimney about three feet long.
That way, they folded up the chimney and used a wing nut and bolt to keep it upright when stationary; when on the road, they folded it down to the REAR and used the same wingnut/bolt to hold it down.
Simple, elegant, takes 2 minutes and a stepladder, or rungs up the side, or roof access to the deck you've built, right?
You could even use cabinet hardware (latches, etc.) to hold it in the up/down positions. Makes for speedier setups/takedowns.