My bump stops actually came right off no problem, 15mm ratchet I believe.
That pic inside the fender well is the driver side, if it is the same for the Ride Rite kit as my Firestone kit, then you remove that 2nd bolt (the one that looks to be dead center above the tire) and remove the spring nut from the backside or inside the frame rail.
Install the upper bag mount and replace with a bolt, washer and nut.
Passenger side should have a larger oval hole opening and the kit should come with a frame nut that fits that hole perfectly. The upper bag mount for that side actually looks different and uses a larger bolt and larger washer to secure it.
Like porthole said, it's just a bit difficult especially if you don't have a lift as there isn't a whole lot of room to sit up or reach things comfortably under there.