You will be good! The most important dimensions when picking a trailer cover is length and height. The manufacturer's take into account the drain spouts and awnings that stick out past the actual 8' width of the trailers. There is extra fabric that will allow the cover to extend over your gutters and awning. This fabric will be cinched down in other places on your trailer with the included straps.
The Adco SFS AquaShed RV Cover item # 290-52243 you were looking at is the correct cover... view full answer...