This was a heavy frost that formed on my quilts and inside and outside of the tarp during the evening while I was inside the house- with gear already hung outside and ready to test at bedtime. Even inside the hammock had frost where it was not covered by the TQ. The picture is the next morning after my body heat had dried much of the frost, but you can still see some inside the hammock. I have had the same thing happen numerous times with dew/condensation rather than frost, even if I was not in the hammock, soaking the inside of my tarp and maybe the UQ shell. The good news is that it mostly seems to stay on the shell and not so much getting into the down ( though that might be a problem if you have to pack up wet) and also this has never happened to me in the woods.
About 1030PM I put a hot water bottle in my hammock. I noticed that the underside of the tarp and outside of the UQ had a heavy layer of frost on them already. About 11pm I sacked it at about 22*F with a forecast for 15*. I accidentally got my jacket a little damp on the back by contacting the frost on the under side of the tarp, and caused it to "snow" a little into the hammock as I knocked some frost loose.