What are folks using for ATV storage/cargo bags? I like the looks of the ATV Tek bags, with the internal frame. Any feedback on these?

When installing a gun boot and/or gun grips, the Outlander L racks can be a bit of a challenge. Instead of being made with all tubular steel, there are some flat areas of reinforcement that don’t seem to play will with traditional u-bolt mounts. Are there special Can-am mounts or brackets that go onto these racks?