Well, this trip didn't end up happening. I got pretty sick in late Feb and even though I was on the mend when it came time for this trip I got cold feet about such a tough route in a very remote area while at less than 100% power.
Took my group to the swell instead, we parked at the end of the Mexican Mountain road and planned to go up and out of Spring Canyon, down Cottonwood Wash, back up the reef to Nates, and then back to TH. This is a mashup of a couple routes detailed in Steve Allen's new (2010) book about the northern swell. As always, his route notes are absolutely top notch, but the route itself ended up being tougher with more routefinding than I had anticipated, and we unnecessarily carried quite a bit of water weight (tons of pothole water and even snow up there right now) and made a lot slower progress than anticipated on the second day. We were supposed to start at the spring/Nates confluence and end up on the rim of Cottonwood Wash, but ended up only making it about to the head of Sulfur Canyon. At this point if we'd had another day of food along, we could have turned the 4-day trip into a 5-day trip and all would have been fine, but we didn't have the extra food (and my 15-year-old kid was eating through our food really fast anyway) so we just reversed the route. It was great out there, will finish this loop another time. Will perhaps post a TR once I go through my pics.