Ok.. Sorry I see it is an 11footer.. Here is a pic of a tadpole swallowing my black bird.. Lots of room.. Perhaps move the tarp further towards your feet a bit? You could be shifting that way while sleeping? That tarp should still work imo.. btw...You can't go wrong with a 2qzq grizz beak.. They will be offering a cuben fiber one as well at 1.8 oz..