Surely you are not going to try and go into Morrisons with the caravan in tow as that would be a bad idea due to layout of car park plus traffic. You will not be popular. Secondly that means driving through the town with a caravan in tow and there are some very narrow areas due to the way cars are parked on both sides.
Why not set up the caravan at the Turbles and then go shopping which is probably a wise and better course of action? BTW Morrisons with the exception of Waitrose, Morrisons is now the most expensive supermarket in the area which is why we now hardly ever use it.