I concur with Bill, I've not had issues with bugs/bees/wasps coming thru the hatch velcro flaps.
There's not much if any suspension on the Trailmanor, and am not sure what the sport version has. I've gone down gravel and dirt roads with lots of pot holes, I go slow, very slow. I found that the first cabinet door would come open and some non breakable cups and minor items on the floor. I use a compression rod for curtains that I wedge on the cabinet door to the bathroom wall. Haven't had anything fall out since.
They come with the fold down sink faucet, if you forget to stow it before closing the shells, it will bend the nozzle in half. I ended up replacing with a different kind of nozzle. No matter what version you purchase, make sure you have a tow vehicle that can pull it up hills and be able to stop on the down hill side too. Having a bit more power for towing isn't bad, being under powered can cause headaches. Good luck with your search.
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