VIcky - the longest run this year is 100, the 105 was last year. There is just one drop bag, which is at the start/finish point of the 10 mile loop, so you need to plan to carry whatever you need for the entire 10 mile loop.
I believe race packs were due to be sent out 1 week in advance, I haven't received mine yet but no need to panic. yet!
weather forecast is pretty crappy for the next 10 days, but nowhere near close enough to cause it to be cancelled - pack your wellies and your mac and enjoy splashing through the puddles!! 