You might consider a Maryland tax free bond fund GW. Below is one that looks decent.
No taxes (state or federal) on earnings.
Does not come without minimal risk--has had one down year as you'll note in last 10 years but has ave 5.3% for 10 years.
If in CA or NY I would avoid due to states finances in general.
http://finance.yahoo.com/q/pm?s=MDXBX+Performance
I went this route last year with all of my and wifes savings in CDs. Only capital gains tax in equation now is on checking accounts.
Put in in Ky tax free bond fund
http://finance.yahoo.com/q?s=KYTFX
Has return 5.66 year to date.
If you look consider this route buy a no-load like above. If you go through brokers they will sell you loaded funds (some as high as 4%) that eat up all your earnings.
another perk is you do not have to lock your money up for any time period. Put it in or take it out any time you want.