Sounds like you have "sticky clients", I don't think Chromebooks support 5GHz wireless band??? Also, you might consider lowering your SSIDs to three(if possible) or less to reduce overhead traffic in the "air". If your Chromebooks support 5GHz, you could test with two SSIDs(i.e. Network2, Network5), one assigned only to 2.4 and the other 5GHz. And, for the 2.4 setup, use channels 1, 6, and 11 only. To overload a switch with wireless traffic would be pretty extreme. We have RTSP set for forwarding(which I think is default), and AP ports are set to trunk. However, making changes on the switch port like that could cause issues, so be cautious. Also, check to make sure you're running the latest stable firmware on your devices--the Meraki hardware.
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