I spent a night in the Black Diamond Beta Light last summer in Rocky Mountain National Park. We pitched it over moist ground and had some condensation but the walls are so steep, it does not drip inside. My friend is large and we had no trouble fitting inside with gear. We even cooked a meal inside while all hell broke loose outside, not one drop in the shelter. Great tent and the easiest I have ever pitched. Stake down the corners, crawl underneath and prop up with the trekking poles. I replaced the stakes with MSR needles, total weight 1lb 3oz.
As for a sleeping bag, I think a mummy bag is going to be best, keeping more of your own "body heat" closer to you, but otherwise, I don't have a preference. Marmot, North Face, Western Mountaineering... there are all good. As for now I use Mountain Hardwear 20 degree synthetic bag, about 2 lbs.