The etrailer hitch you mentioned is 45-7/8 inches, so much narrower than you need. For a trailer like your Fleetwood Evolution, you'll need an adjustable width hitch as there isn't one that is 60 inches on the nose. So what you can use is the following:
- Adjustable Width Trailer Hitch Receiver for RVs, 22" to 66" Wide # C13704
The # C13704 is for frames between 22" and 66" with the hitch crossmember being 68-1/2" long BUT you can trim the crossmember to the exact dimensions you need... view full answer...
I recommend the Camco UltraGuard Pop-Up Camper Cover, # CAM45763 for campers that are 12'-14' in length. This will be a snug fit in the width but have extra length. Simply cinch the fabric in on the ends for tight fit all the way around. view full answer...