I'll be going to New Mexico at the end of the month for a one week trip with my wife and my dog. Taking along a bunch of camera stuff as well, I'm planning to shoot a lot of B/W at the white sands dunes near Alamogordo. As a rule of the thumb I know that exposure should be 1 to 2 steps on the overexposed side but does anyone else recommend I use a different thumb or rule? White sands and snow are probably hard to expose right for and as I don't have any snow here in AZ, or white sands for that matter, I thought I'd ask my friends at TPF. Any thoughts? Oh, BTW... as a funny happening, we didn't plan it this way, we'll be seeing the new movie "War of the Worlds" on June 29th (the day of release) while visiting Roswell NM. Talk about aliens and UFOs!!!