great r.r. I just returned a few weeks ago from a nine day trip, including two spent riding the Rainbow from Sargents on the north end (over Marshall pass) to pick up the singletrack down to Hayden rd (where we'd had enough at 85 miles to hayden Rd., popped out on the highway down to westcliff for the night for 110 mile or so total). Second day we did the 30 miles of trail from Westcliff to Hayden Road, up thru Salida to the north nine miles of the rainbow (my favorite section) and back over Marshall pass in a torrential rain/hail storm right on top of the pass.
Great thing about the Rainbow is all the different ways you can ride it. Camping in the middle as you did looks like a great option.
We then moved camp over to Spring Creek Reservoir where KTM Talk was having their big ride/campout in the meadow right up the road from us. Did three more days and about 300 miles more riding.
Awesome week of riding.