Be mindful when deploying AP's in a HD environment as you need to take into consideration the max-aid and rpm value of the AP.
I have found the following are safe numbers on the following AP's
7363 = 90
7372 = 125
7982/7782 = 160-175
Note: You may see if you don't set these numbers that the AP will kernel panic and reboot, and kick the clients along with it - happens in true HD environment.
What is happening is the AP is running out of memory.
To fix this issue you need to ensure that the max-aid and rpm values are the same (max-aid controls the connected client cache and rpm the unconnected client cache) - this creates a see saw effect between the connected and unconnected client cache which makes the AP's memory more stable in my eyes.
Note: There also is a bug on certain ZD code, which does not allow the commands to be taken successfully and the AP's will still kernel panic and reboot (there is a fix coming).
I would also recommend using Proxy ARP along with VLAN Pooling!
Good luck with your HD deployment!