I have done two full-sized cots in a Kifaru 6 Man tipi, sometimes with a third guy on a pad, but no stove. It was fine for what we were doing, but the geometry of the tipi and cot combination is not optimal for efficient use of space, though as others said it is nice to be able to sit down and you can store gear under the cot. Even for low to the ground cots or pads, it pays off to be mindful of how you pitch a tipi with the slightly higher up tie-outs pulled out to get the walls more vertical near the bottom.