I'm kind of a noob. I've shot skiing before, had a lot of pics come out great, but I'm still a noob. It looks like I'll be taking a lot of pics in the coming two weeks, seeing as I cant ski, but I can hike, however, most of this will be at night. I've got the lights in the park on poles to work with, but nothing great. What do I need to know? I'm shooting on a D50. I'd like to save the learning the hard way part, any advice I could get on settings, working with artificial lights, etc would be great. Thanks.