I've been wearing something on my head at night for as long as I can remember. It has always been staple for me. No matter how I wore my hair. I've been rocking a satin bonnet for years. YEARS!
I also have a satin pillow case that I sleep on as well but for the most part, the bonnet stays on all night.
I don't even lay on carpet without putting something over the locs. That lint issue is no joke and I don't want to have 7-year old locs with a crap load of lint trapped in them. I know it's unavoidable but if I can decrease the chances a bit, then I will do just that.
Do you wear anything on your head at night?
ETA: Ladies with longer locs, check out this post. Who knew there were shower caps just for long hair-ed folx? Beautiful!