Bill,
Bak-Flip MX4 is an excellent cover. Assume you wanted information posted about other covers, too.
Been looking over a year and decided to go with a Diamondback SE cover on our Tundra. It's not hard to remove, if needed. Used the Diamondback on a camping trip earlier this week and it works great! Some folks transport ATVs on top the cover. Our cover is rated for up to 400 pounds weight.