The size of saddlebags you want sort of depends on how compact and light your camp gear is. With the much smaller VP-125 horn bags I was able to pack just enough food,micro- stove, water, light, etc for a solo overnight trip but all bedding, tent and a fleece sweater had to go on top of Cyclerack. I also have a set of the much bigger but discontinued insulated VP-175(?) that should be able to gobble up three times the volume but bedding still needs to go on top of rack in Cooper's spot.
I had planned to test the bigger Versa-Packs overnight this weekend but severe flu has laid me up.
The Versa-Packs have a low list price but the shipping is a little steep so I ordered several items to dilute the apparent shipping cost per item. I got three of the cantle packs so I could stack like cord-wood similar waterproofed logs of sleeping bag, tent, clothing and Thermarest.
So for occasional use I think the Petandhorse Versa-Packs are acceptable. They sure fit over the CycleRack nicely. Zippers are a little difficult to manage. Color choice is limited but they could be dyed black.
Twilight had some bags in Moab that seems easier to access, Wolfman brand perhaps?