I really like the quality of the covers which Watkins makes for their tubs: HotSpring, Limelight, Hot Spot and now Freeflow. I have sold and installed the Cover Cradle I on all of the Gleams we have sold, and I have to say it's the right setup for a cover that big.
But having said that, I would not hesitate to order a custom cover from Robert's Hot Tub or Ideal Spa Covers. Get a three or even four-piece cover and a pair of Cover Shelf units. That way any smaller person should be able to open one section and enjoy the spa, or push the whole thing off in two pieces.
HTH