Steve, I'd just throw what's left over into the same basket as Cottonwood Lakes, Onion Valley, Big Pine Lakes, etc. You can reserve what's left for $5...95% of the dates left over will be in May, June and October...the whoever wants a permit can walk in and get one months.
Personally, I'd like to see the whole thing online. On Feb 1st, the world can play, let's see long it takes to crash the Inyo's contractor server. No lottery...just like to old days.