Your 2011 Heartland MPG Model 183 Trailer does have the same teardrop profile as the R Pod Campers so the Classic Accessories Deluxe PolyPro III HD Cover # CA80200 that you mentioned will work great. It fits trailers that are between 18 and 20 feet long like what you have and its elasticized hem will allow you to eliminate any slack once you have it draped over.
The PolyPro fabric top combined with the triple-ply construction will offer superior protection while the trailer's in storage... view full answer...