You should be able to avoid the use of the generator if you practice electrical conservation when dry camping. Using few lights, lower wattacge lights (5W instead of 10W that come in the CCD overheads), or adding LED alternative to a few key fixtures. Ading solar panels would be even more benificial. However, none of these solutions are going to help you if you need to run a hair dryer, toaster or coffee pot. Some have made mounts to attach a generator (or two) to the a-frame of the trailer, just behind the LP gas tanks.
Also, If your in Summit County and want a good place to stay, relatively nearby to Kremmling is Williams Fork Reservoir. You can easily get a trailer into the campground on the east side of the reservior and your camping right on the water! Not sure if you'll have time to do this before you leave. Also, why go I-70 down to Denver and up I-25 when you could just go North towards Steamboat and meet I-80? It would be a MUCH prettier driver and less stressful than I-25. Advice from an Ex-Summit local.
Chris and Christina- Boerne, TX / Evergreen, CO - TAC TX-7
2008 27'FB Int'l Signature CCD