i used to wear hats from http://www.headcovers.com every day at my office job, & they worked beautifully. here's a pic of my dreadhawk (previous set) & how it looked tucked away:
(more pics are here if you like.)
my dreads were hidden particularly well since i had the bangs & forelocks, but the hats are designed to cover your entire hairline, so most dreads should fit in them pretty well. anyhow, i don't need all of these hats anymore, so i'm selling them for $8 each (two bucks flat shipping to the US or $3 international). most of them were 15-20 new, iirc, & they're in good condition. they're all cotton, the top left two are microfiber. the lace one (second on the right) is pretty tight, i couldn't wear it. you can find more info on the site, or just ask.
purple - sold sl1ngsh0t
blue - sold thehobbit
black - sold shalajarias
green - sold thehobbit
black with white - sold sl1ngsh0t
black lace - sold pinklikepussy
black2 ($5 on this one, i wore it pretty often.) - sold dali_drama
also, i bought up a ton of hairwraps, but i only ever wear a couple of them. i'm selling these for $13 each, same story on shipping. they were 20 each where i bought them, & have only been worn once or twice, if at all. they vary from 60-70" long. let me know if you have any questions.
& oh right, payment! paypal's preferred of course. i have a link set up at the bottom of my hair page where you can use a credit card directly if you don't have a paypal account.
thanks for looking.