I think the frame would help a lot - I was talking about the normal covers that you throw onto a bike/mower. I was really inspired by these across the pond. That $4k price tag is ridiculous though and is more expensive than when I looked a few years ago before getting the trailer. I think they were priced around $2500 but maybe I'm misremembering.
Another benefit of the framed covers that you are looking at is that they seem to have much thicker material that could really withstand some wind when paired with the frame. The reviews look fantastic with this one. It looks super sturdy and the reviews seem to reflect that it's moisture proof. A little pricey...but it's your BIKE! Only the best.
I've actually had a great time making posts and contributing to conversations here. Everyone on these new subs wants to get the ball rolling, so any input usually brings something to the table. !Motorcycles went from 17 subs and 0 posts 5 days ago...to 230 subs now and a page full of posts and comments.