Map 300 different VLANs to a SSID?

Hi Everyone,
I've just come across a situation where the customer requires to have their 300 different VLANs (they got 300 stores across AU) to be mapped to the same SSID. I know this is doable by creating an interface group on the WLC that contains all 300 VLAN interfaces, then map the interface group to the SSID. However, is there a better way to do it? I meant I don't think creating 300 interfaces on the WLC is a good idea from a managment point of view.
Thanks you in advanced for your time and for sharing your wisdom.
Regards,
Nhan.

Hi Nhan,
This post in Small Business Forum and you need to address this in Enterprise Level Forum.
Thank you.

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