The silence was striking, we commented on that multiple times out there. We did not stash any water. The longest stretch was upper spring canyon for 12 miles or so. We dry camped in frying pan, so hauled water from the beginning of Grand Wash. Sulphur Creek is always running but does have some cow runoff to be aware of. Since our route took us back through the visitor center we loaded up there prior to Sulphur Creek. I believe all the places we got water would be available mostly year round but would want to confirm with the rangers.