I believe you will need to configure an ap in the remote site for mdns snooping. Once you enable that, you will be able to specify which vlan the bonjour servcies are on. Dont forget to configure the switchport the ap is connected to as a trunk and add the vlan to it. This will allow the wlc to learn about the service by allowing this ap to sniff the wire.
Do you have wireless to wireless bonjour working?