I figured out how to get VLANs working on the E1200. To be honest I got some help from the DDWRT forum but I think drawing it out helped a lot.
Someone named Per gave me the settings to use
nvram set vlan1ports="4 5*" nvram set vlan2ports="5" nvram set vlan3ports="0t 1 5" nvram set vlan4ports="0t 2 5" nvram set vlan5ports="0t 3 5" nvram set vlan3hwname=et0 nvram set vlan4hwname=et0 nvram set vlan5hwname=et0 nvram commit reboot
Wish I figured it out, but I think eventually I may have.