Seeing as your in Canada I would call my local building department and speak to the head electrical inspector,he should send an inspector to look into your site as it's a flat out fire hazard. I was seasonal at a "campground" in "Windsor" where I was supposed to have 30 amps,one morning my neighbour was banging on my door telling me the post where I plugged into right next to my fiver was a-blaze,i yanked the chord off the plug (which was almost burned off) and the main 30 amp breaker didn't even shut off,the guy who owned the park response was "If I fix yours site i'd have to fix every one elses" needless to say I got a refund and left the next day! A lot of these rv capgrounds were built so long ago and at least here the owners simply don't want to spend the money to upgrade to accommodate these big units that are common-place now. Find out weather his wiring is hinkey the is he doesn't want to cover your losses haul his can into court!
Good luck!