Take a look at the rhino rack roof rack system y01 120.
Tent trailer roof rack.
Sportrack camp trailer rack system 3 5 out of 5 stars 59 woowave kayak roof rack pads universal car roof rack soft premium surf crossbars cross bars for surfboard sup paddleboard with 2 waterproof tie down straps and portable storage bag 33in long pair.
These tents gain most of their support capacity from the ladder because the crossbars they normally sit on are only rated for.
What you need is a system that comes with tracks that mount to the top flat part of the roof.
You are correct the sportrack tent trailer roof rack sr1020 will not work if the trailer roof has rounded edges.
The roof rack system can accommodate any roof mounted bicycle carrier in our stores.
The tracks with this system are 63 inches long.
The diy system works with utility trailer and many other types for converting them into camping and multi sports trailer.
This roof rack system kit is simply the rails that attach to the tent trailer.
We would recommend using a four one bicycle fork mounted carriers as they will provide increased stability over wheel mounted carriers.
Then for a tent compatible with the bars i recommend the yakima skyrise hd tent for roof rack crossbars 2 person 400 lbs y07436 or the yakima skyrise hd tent for roof rack crossbars 3 person 600 lbs y07437.