Does anyone every stake out the sides of there bridge? As I have not even slept in mine I am not sure how i would do, but my soon to be nine year old uses it. This last trip I staked out the head end of the hammock to keep it secure. Any thoughts? He has a tendency to make large flips before he is in the sleeping bag. He hadn't fallen out before but this time it was raining and muddy and I felt better.