I think you can not have only Radio Management without Fast Roaming when you enable WDS on the AP. Fast roaming is automatically enabled when WDS is used.
Cisco usually recommends one WDS AP per building. If you think the WDS AP is over-burdened, have you considered using WLSM to provide WDS? Response time will be much faster with WLSM compared to a regular Cisco AP. One more thing, the latest 1240 series APs have more processing power compared to old 1200 series APs.
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
This is the start of a display filter cross reference between Wireshark
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