The two 23' narrow body models have two axles and four tires so you could limp in on three with a flat....
The Hensley hitch head is heavy, but has to be only removed annually to put grease on the ball. That can be done by stacking some wood below the hitch and lower the Hensley down to rest on the wood. Release the ball and raise the tongue to lube the ball. Reverse the process and the manual lifting was only for the boards.
Most Airstreams have awnings, so a rod is used to undo the locks and pull the awning out. This is overhead activity with very little weight associated.
Dropping the spare down and putting it on the trailer would be the most arduous task.
Handling the sewer department requires rubber gloves, but not much weight.
Good luck in your research and welcome to the forum. Lots of information and opinions. After awhile, you will be able to discern fact from fiction.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels