Deciding between the 2, will be used floorless mostly. Thinking the 5 might be a little big for sheep, but the extra room sounds nice. Anyone packing the 5 up the mountains instead of the 3? The 3 should be easier to pack, easier to find a place to set and better in the wind. 5 would be nicer for room (always have the pup with me) if I have another guy. If you could only have 1, which one? Anyone know what they weigh without the nest?