Fuel stops with RV islands

If I am going to be just around home, I make sure that I am full when I leave and then can figger on at least a 500 mile r/t. I always use Costco as they have the best price and usually have enuff room to get me and the toad out of. ( Always check entrance and exit before getting in line). When I fill,since my filler is right behind the front door, I only pull up to the first pump so that gassers can use the two pumps in front and have had several people yell at me to pull all the way up and then when they've finally figgered out why I did it that way, kinda get that sheepish look.