I use an Orion Dovetail L-Bracket for this purpose.
http://www.bintel.com.au/Mounts---Tr...oductview.aspx
The vertical leg fits the Celestron mount where the dovetail on the OTA usually goes, and the horizontal arm with camera mounting screw will support camera bodies, small telescopes, binocular adapters, etc. You can set up the GoTo in either Alt-Az or EQ mode (with the built-in wedge on the mount), and you should be able to do quite long exposures with a reasonable EQ alignment.