the put-in is a nightmare. the combination of shuttle and put-in logistics is CL V+ compared to westwater at maybe only CL II+ (just for length of drive). there are other posts about gunni gorge put-in info for a pack mule service to get your gear down, but they could run several hundred dollars to get enough gear down for a 3 day trip. the outfitters just slave drive their guides to get their stuff down, but if you are doing it as a private it will be either expensive or a lot of effort with several round trips down and back on the Chukar Trail. the river length is only about 12 or 14 miles too, so you will only be doing a few miles a day (given the last camps in the gorge are about 2-4 mi above the take out). i have done it as a day trip several times, and as an overnight last year, and i decided to never overnight it again unless i was doing it as a fishing trip. the fishing is awesome, but for whitewater it is better to just do it as a day trip IMO. here is a discussion with more info and map links: Gunny Gorge
another option might be the upper colorado from pumphouse to dotsero. non-permit with a few CL III rapids, the lower stretch below state bridge gets pretty mellow but you will at least have some relative solitude as there is not a lot of river/boat traffic there. three river days should get you the whole stretch, but there are other take out options to shorten the river mileage. i have only boated from pumphouse to state bridge, and driven the road alongside the river about 10 miles upstream of dotsero. pretty good fishing along this stretch, but not nearly as good as gunni gorge. later.