I know this post is kind of old but I haven't seen anything posted from you indicating you had success.
Here is a photo of the moon I shot not to long ago using the Canon 75-300mm F.5.6 with IS.
I used a tripod of course and these are the settings I used.
Shutter : 1/180
Aperture : F 9.5
ISO : 200
Focal length : 300mm
The one thing I messed up on that I didn't catch until I read the Exif Info was the White Balance was set to Daylight but I still caught a nice image.
Hope this helps.