According to my research, your 2018 R-Pod 179 travel trailer is 20' long x 96" wide x 115" tall. Therefore, for a storage cover that may work well for you I recommend taking a look at the Classic Accessories PolyPRO 3 R-Pod Trailer Cover part # CA80-197-171001-00 as this cover is specifically designed to fit RP-179 R-Pod travel trailers. As long as the distance from the top of your A/C vent to the bottom of the cab on the trailer is no more than 93", then the above cover will work well... view full answer...