The SBIG remote guide head is not as sensitive as say the SX Lodestar, so you definitely need a rotator. Especially for isolated galaxy shots. From experience, and with a longer focal length, you need the MOAG and a rotator. I've been happy with the TAK CAA. But this will be useless when remote imaging (if you do that).
The AOL works, and those who don't see the point either have shorter focal lengths or simply don't understand what the AOL does. The RC12 will be sensitive to even the most gentle breeze, and when doing +20min exposures, the AOL will save the sub, when guiding at 2hz or faster.
I can also say that the Maxim tools for the AOL are terrific. It takes only 30-40sec to calibrate the mount, and about 20-30sec to cal the AOL (if that). Only an annoying tilt in my system affects my star shapes in one corner, otherwise, the AOL ensures my stars are tight and round every time.
Here's an example from last Friday night, and I image in Melbourne, so significant light pollution too:
NGC6188
As mentioned above, back focus must be calculated to ensure you can still reach focus with everything added in.
Good luck
,
Steve