I, too, was going to suggest Oasis - they'll do a run of as few as 300 with a 4-panel "booklet" for about $1200 - see their price list and services here:

http://oasiscd.com/music/FF_price_list.asp

I'm glad you're doing this, Barry! You'll get rid of a run of 300 CDs just from your friends - and that doesn't count folks who'll buy them at NEFFA or Mystic after hearing you sing!

One comment about graphic design for the CD booklet - there are WAY too many CDs out with unreadable liner notes, because an "artistic" graphic designer has decided to use reversed-out type over a 70% transparent illustration in the latest designer colors of mauve on a teal background - forgetting that the primary function of the liner notes is to convey information, not show off artistic graphic text design.

Make the front cover of the CD eye-catching and have the illustration give a potential buyer unfamiliar with your work a clue about what kind of music this (easy with sea songs and other work songs), but make the internal liner notes and credits easy to read (not that that's easily done, given that if you want to write a good song description, it'll get shrunk to about the size of the type in the 2-volume OED...)