I am experiencing some issues with laptops in a lab not being able to associate properly.

I'm in a university environment with 132 APs at the current time.

The lab in question is in a building with 6 APs total: 4 on the 2nd floor, 2 on the 1st floor. The lab itself is located on the 2nd floor close to the central point of the 4 APs. They plan to use 30 laptops at once via wireless.

There are also many other areas on campus that have a focused load (common student areas for example).

For the lab specifically, would this be a viable condition to enable load-balancing? I'm thinking a client window of 10 or 12 should work.

All 6 APs can see each other, and all the 2nd floor APs can see at least 3 other APs with -70dBm or more (stronger).

My current threshold is set to -65dBm, but I will be changing that to -70 to meet current recommendations.

Also, what is considered 'high density' in terms of LWAPP deployments? Is there a certain number of 'visible' APs to aim fo r(from each AP's point of view)?

Finally, will changing the threshold and enabling load-balancing require controller reboots, or can I just apply them on the fly?

Thanks.

Edit: My WLCs (1x WiSM blade) are on version 4.2.61.0.