Hi Georan,
More support sticks were placed and we used fern leaves and then put over the leaves, cant say they were dry as it was raining heavily by the time I had finished, and yes I did sit in and it was waterproof, and I had a little fire going just near the entrance to warm my hands etc. Not sure about spending the night in the woods on my own, Im a coward LOL - maybe next summer when I grow up and get brave.
Thanks for the lovely comments, must admit I did enjoy making it.