you can get tiny disposable bottles for oxy torches.... It very quiet and you could easily cut those clamps off.... Especially given the trailer has two axles, who would care if they have to tow it with one flat/melted tire .... I wouldn't !!! Infact they'll probably tow it a short distance, then fit the spare that's come free with the trailer
I'm going to keep my trailer locked up in a shed ....... With a 40kg rottie wandering the yard. For starters the trailers are hidden in the shed.... and damn you'd have to be brave to come into my yard and steal them. It's likely a very p!$$ed owner may turn up at home trapping you and your tow vehicle in the yard.
Blocking the trailer in out of reach of a flat tray "crane truck" would be ideal. Unless of course the crane truck first lifts all the other cars out the way, then enters the yard within reach of the trailer. It's not like you would be rushed if you live in a remote area. If it takes you an hour to get to and steal, this is no big deal.
seeya,
Shane L.
'96 Big BX 2.1TD exclusive slugomatic (aka XM)
'85 CX2500 GTi Turbo Series II (whoo hooo)
'96 Xantia VSX slugomatic (sold !!)
and of course, lots of old Citroens, slowly rusting away in pieces