Just got a surprise email today that a permit for Clear Creek in GCNP went through. However, I only have two nights, both in the Clear Creek AZ9 open camping area. It seems that most do this hike in at least 4 days, with a stay at a corridor camp in the way in and out. Ranger's email to me was ominous, to say the least (see below). I'm sure this is standard language, but it was sufficient to make me think twice. No wonder permits were available! I've done up to 25 miles in a day with a pack on, but not in a hot area, so 12-16 with 2-3 water sources en route seems doable.
I'm thinking I'll watch the weather and play it by ear and decide the day before whether to go to the Supes or GC.
Would probably take Bright Angel to the first available spot on the Clear Creek trail the first night, use that as a dry base camp and drop gear there. Explore Clear Creek itself and restock water the next day. Leave via South Kaibab the following day.
This is the hike:
Ranger's forewarning (yikes!):
"However, before we accept a $42 non-refundable payment from you, we want to make sure you understand what you requested. Experience has shown that trips such as the one you requested all too often result in off-itinerary camping, injury, and occasionally even death. Please do not accept this itinerary merely because it is available. Make sure it is what you really want and well within the capability of all group members."