Welcome to the Casita family!
Attached FileOne of the security enhancements I made was to
hide an Airtag in the trailer (along with several fake decoys).
I don't have an iPhone or any other Apple devices capable of tracking it, but several relatives do - and they'd be glad to help if it was ever stolen.
A hitch coupler lock is always installed whenever the trailer isn't hitched to the tow vehicle, and there's also a padlock on the coupler latch.
I've also been toying with the idea of installing a hidden kill switch for the electric trailer jack hitch - Make it a little more time-consuming for them to raise the tongue enough to hitch up, and raise the pad enough afterwards to keep from dragging it.
Like you, I elected to not have the optional propane furnace installed - They're noisy, drafty, and consume a significant amount of battery power.
Instead, for winter camping, I remove the cabinet door that occupies the same space where the furnace would have been installed, and put in a Camco "Wave" 3000 BTU catalytic heater.
Casita puts an extra "Tee" fitting in the propane line that feeds the stove burner, for connection to the optional furnace - it makes a very handy place to connect the catalytic heater.
The heater gets removed and replaced with the original cabinet door during the summer.