I would not worry about it. We towed for many years with a gas vehicle and then for the past 15 years or so with a diesel. Never had any major problem getting into and out of the pumps. Did have to back out several times but just had my wife watching for traffic. I always tried to get the pumps on the far right - even if it meant partially blocking the entrance or other pumps. Just look the situation over as best you can before you pull in. I doubt you will have any problems.:)
Barney