I'm not privy to Mike Cook's reasons for scheduling the rain date for 10 - 16 October, but it might be something to do with BLM's permit process. Mike told us, at the impromptu meeting in the Enola Gay hangar last Friday, that the BLM manager (don't remember her name right now - sorry, ma'am) has been doing her utmost to help Cook get the meet up and running - pushing papers through way faster and changing the 30 day waiting period or 30 day before submission date - - to much less time.
Maybe, anyway, the mid-October dates have something to do with permits or such. As for the SCTA/BNI courses interfering with Shootout/Int'l course - the two cross each other on a diagonal, so if the SCTA course were chewed up from WF (for instance) there'd be a relatively small bit of course that needs fixing - maybe a half-mile, maybe as much as one full mile. That's all, and that much isn't impossible to do.