I am by no means an expert, but I almost always carry a Nikon D80 with the Nikkor 18-200mm lens. I've hauled that combo up many mountains and numerous multi-day backpacking trips. The only time I don't bring it along is while MTBing. That lens is pricey and maybe not great optically, but it's good enough for me and the best part is you only have to carry the one lens and don't have to worry about swapping them. To me the extra weight/bulk is worth it, although I haven't owned a point-n-click camera in a few years. Maybe they have improved substantially but what bugged me the most with them is turn-on time, shutter lag, and zoom range. For landscapes... not so important, but for wildlife, action shots, or if I'm out with the kids (who don't hold still
), it's often the difference between getting a shot or not.
Costco had the D5100 with two lenses on sale for under $1000 recently. If you want a DSLR, I'd check that out. Good luck.