Digital BW, The Print

Hi-

I'm planning a trip to the Kelso Dunes in Majave National Preserve in 
mid to late October.

Any reasons why this might not be a good time of year to go there?

Any advice on time of day to shoot the dune? Sunrise or sunset? or 
both?

Any "secret" spots to get great shots from ????

Thanks,

Tom O'Connell