ham antenna mounting on Airstream
I use a Don Johnson (SK April 2010) W6AAQ DK-3 screwdriver antenna on our trailer. I use a piece of wood I have cut two holes the diameter of a R-S TV mast and one large hole that fits the diameter of the electric jack in the front. Since we have an Hensley hitch I can screw up the tightness of the weight bars to hold the wood in place. The two mast holes come out past the triangular hitch where I have mounted two R-S clamps that use U-bolts to secure the mast to the triangular part of the hitch and the hole through the wood to ground.
I use two five foot masts and mount the DK-3 on top of ten foot of mast. Using a 1 inch braided lead for ground which is attached to one bolt of the U-bolt on the mount on the hitch. The coax goes along the road side of the trailer into the side opening under our dinette. That coax goes to an ICOM IC-706 MK II G radio and SWR meter. The ICOM has the 10 watt test generator so I can tune the antenna with the screwdriver. Power for the screwdriver also goes through the same path as the coax.
Seems to work well and have made some good contacts using this method.