We too have a caravanstore and have never had a problem.
I have used it on a tarmac pitch, held down with nothing more than a couple of gazebo weights although usually it is pegged down through the feet and has a storm strap on it. I also always use the extra tension rafter.
(In fact I've got it up now in a car park in Austria!!)
Last season, my caravanstore was put up when I arrived on site in March, pegged and strapped down and stayed up until mid October with absolutely no problems.
As for travelling with the caravanstore in place, mine is now 6 years old and has only been removed from the awning rail once (when we changed vans!!)
During this time, it has travelled close on 25,000 miles on our various European excursions, with no problems at all.
Best of all, they are vinyl and aluminium so you can pack them wet and have no worries about rot or corrosion.
A tip for anyone using caravanstore is not to put it up level. ie make sure one side is higher than the other. This way, any rain doesn't accumulate on the canopy but runs off.
-------------
|