In south central Colorado from my experience it is hard to beat Bart Caldwell ( Conejos Canyon Outfitters ) I've used him and he ran a first class operation.
agree with others on vetting / references !!
Bad thing is that the top Drop Camp outfitters are usually booked a full year out. And they allow their customers to resign up before an outsider can get spot. I agree with this logic it just makes it tougher for newbie to get spot.
Back to Bart listed above, it was hard to call his set up a DIY drop camp. Hell, he cut my firewood for my wood burning stove, set up tent by creek and it was fully furnished except for sleeping bag, food and rifle.