What Harrisburg are you in? Are you referring to Alans Factory Outlet? They sell Carolina Carport brand, I have one and LOVE it. 31' long, 18' wide, 10' legs. Its plenty tall enough for my RV, parked right in the middle. We keep the slide open when we are home, makes it easier to get in and out. Side window's open on the slide and roof vents open year round to keep temps and humidity stable.
Its rated for 120 mph winds (or something like that) and a decent snow load as well. We love it and have no regrets. I paid something like $2200 and plan to stay in the house for 13 more years. It comes out to $170 a year for covered storage... hard to beat that!