I was told here in Pa. That a carport isint like a garage so people can do it, ive seen them sit right in driveways, one with sides and back but no front.. it was on the outskirts of town but still in the boro. of course when you enclose it, that would be a different story i imagine. But if you put up a 18x20 and just used pieces of your tent that came down to keep the weather off, that might work. Sometimes you can explain these things and if the right person is listening, you may be surprised. 18x20 holds my car but only a foot in front an back,, the width, no problem.. all they can do is say no, i think id talk with them and see if they will work with you. just a suggestion, your due some good luck i believe.