bobsills,
This is absolutely possible. We have all of our wireless APs added to MARS. Simply add them as a Cisco IOS 12.2 device and MARS should be able to log in and manage the devices. We have everything from 1200s to 350s monitored via MARS. Ensure that you're using IOS on the APs, as older VxWorks ones cannot be managed by MARS. Any other questions I can answer please let me know.
-Mike
http://cs-mars.blogspot.com