I watched their videos, however, it appeared to me that they put a very minimum effort into removing the Mega Hitch Lock. Probably because that they are selling them. The Mega Hitch Lock might be great but I would like to see an unbiased video with someone trying to tear it off a hitch like they did the competitor brands. They are a little pricey but might be well worth the $100.00 if someone tries to steal your trailer.
As far as using chains on your tires, you first need to see if the brake drums cover the back side of the tire and wheel. My new 2014 Jayco Flight 26ft. has electric brakes and a chain can't run through the wheels. Already tried that.
By the way, my RV dealer sells two styles of hitch locks and neither will work on the Jayco trailer with a wide lip on the hitch. One is the yellow hitch and the other is Fastway Trailer hitch (maximum security universal coupler lock). Both were shown in the video referenced in the email above. Some of the newer Jayco trailers have a wide lip on the hitch, which prevents most locks from fitting. At least I haven't found a good solution yet. The Fastway Hitch has two side shanks which aren't long enough to connect with the locking mechanism on a fat lip hitch.
I'm certainly open for any suggestions, as our trailer is parked in a community rental facility with other campers/boats/etc. and folks come/go at will. Its gated and locked but still not too secure.