I'm honestly just running a low pro yakima box. Fits my traction boards, shovel, and some other random things. Have the box all the way to passenger side. Cvt awning on drivers side also using L brackets. Been fine on stock bars. During winter the awning comes off and angled snowboard holder goes on.
We have Yakima towers with the widest bars we could manage. Can manage our two whitewater canoes as pictured, or our long boats (15 and 16ft canoes)
currently it's loaded with a cargo box and a tandem sit on top kayak for our vacation.
Not exciting but I put a Tuff Stuff awning on top, driver side. I was told of the c-channel under the rubber on stock racks and sure enough, after a trip to the hardware store for nuts and bolts and up it went. Plenty of room inside for everything else so far.
I use a curt rack system because it works and its inexpensive and can mount all my recovery system, camping and hunting gear even on their short system. It mounts to the stock rack rails and as long as I don't over load it when offroading.
I just have an awning that I put on the drive side. Probable the best accessory, that I have, to of spent money on. Super convenient when out racing XC, CX, etc.