My tips from my one single stay in a CVP in our side-opening 10ft Lifestyle softfloor CT:
-Measure your trailer and annex setup, write them down, and keep 'em in the glovebox of the tow vehicle. When we arrived at our first CVP stay, they asked how big the CT was, and I just had to shrug my shoulders and blush
-Apparently some places have a rule that on their one-way sites, you have to have the drawbar to the road for emergency reasons (place catches on fire, people can haul arse out of there without turning trailers around and whacking into each other in the calamity.. fair reason I guess). So you can't just reverser it in then swing it around to suit. Again, check site first before accepting/setting up.
-Check the site, if possible, before accepting. Some grassed sites have trees in the middle of them which might work for a few tents, but doesn't work for CT's. We found the site we were offered had two big trees dead centre, and I borked at it - the owner was a top bloke and walked to the site with me, and with some rough measurements we worked out it would just fit and he actually reverse it in for me.. awesome!!
-See the 2 points above.. if they offer to do the reversing, hand them the keys!
-As others have said, be concious of which side/way your tent flips out - would be awful to reverse it, get it right, drop then legs, then flip it out into old-mate next-doors bbq area!..
-Remember that its not just the tent/trailer footprint you have to factor in when positioning it for setup - you've got ropes and other stuff that extend the area. Suggest that you do two sets of measurements so you know for sure. The place we went to (as I'm sure many do) had lines marked on the grass (like say a school sports oval running track) which you had to keep inside, including your pegs/ropes. Something to consider when positioning. We went over the line because of the trees in the middle of the site forcing me to one side of our patch of grass, but my good neighbour for 3 days kindly told me he was doing me a massive favour by allowing me to cross the line. I thanked him immensely for his kind nature. What a dick.
Have fun!