After I had a zeroturn mower stolen out of my yard and hauled away on my 16' utility trailer I got serious about locking down my Airstream.
Here's a pic of what I use. No one is going to get through the Fastway lock without making a LOT of noise. Then they have to cut the Master lock holding the hitch lever down to use the hitch.
The only key in the Master Key Hider is the deadbolt key. The other keys are hidden in the trailer.
'82 Excella 34' "AlumaLady"
'06 Ram 2500 Lonestar
"Mollie Bug" The Boston Terrier
WBCCI #4456 - Born to Cruise