Hi Ron,
after using this service station Saturday afternoon, I wouldn't recommend anyone to use it again! It seemed the whole of France decided to stop off and fill up with fuel & have something to eat. There were staff in yellow jackets rushing through people filling up with fuel, then directing the caravans to the caravan designated area only to find it completely full up with cars only. Myself, my friend & 2 other caravans were stuck and had to stop the traffic, turn our caravans around or squeeze through the grid locked caravan area to get out, yet cars and caravans were still piling in. My wife tried to get the yellow jacket brigade to stop directing traffic to the caravan area but they didn't want to know at first. La Baie de Somme was like the Battle of the Somme !!!!
Sorry, I'll get back to your original question. If I were you, I'd see if there were spaces available at the front of the service station. If they were full, then at least you'd be able to move on to the next one without getting jammed in.
Regards
Mark