Agree with Rob-T, but then I would as I'm also a Rob T.
The first stop must be the insurance company requirements which are sure to include a hitchlock and Wheelclamp and it seems sold secure endorsment is the standard.
I beleive many policies like the to see a hitch / security post if the caravan is kept at home and I imagine the heavier duty the better. RSJ in a cubic meter of concrete should do it, but then youd never get the van out
Locking wheel bolts on Alloys, some Bailey wheels have small bolt heads, It took months to get the correct size for my 2007 Senator, even my dealer had no idea that standard Milenco (SAS) wouldn't fit. Towsure eventually sorted by talking to Milenco(sas) but they couldn't supply the correct size and I had to talk to Milenco directly. (Milenco one L). The Milenco bolts look far better than some other cheaper brans.
Does the Pageant have a Built in alarm?, may be worth considering, perhaps with intruder, tilt and even hitch alarm as installed by Bailey on the Senator, or I'm sure there are cheaper options.
Bl..dy big hungry dog chained to tow hitch, suggested brand - Rottweiler!
Rob