If you want a trailerable cover, check out evolution or coversports (see picture below). For a good cover that doesn't need to be kept on at 70 mph on the highway, I have seen plenty of good reports about skiboatcovers.com. Sunbrella is my preference.
Previous: 1993 Prostar 205
Red 1998 Closed Bow Ski Boat, PCM GT40, 310 hp, Standard Gear Reduction, Acme 4 blade, Perfect Pass SG/Zbox.
Tyler Ski Club
Be kind. Have fun.