Looking at a solution where we have multiple sites and data guest requirement.
I am getting hung up on the dynamic interfaces as each site has local switching with local DHCP via router and central authentication.
What is confusing me is H-REAP would need seperate ssids per site? Due to dynamic interfaces, or H-REAP with AP Groups or is this just H-REAP Groups, unfortunately I don't ave the luxury of time to experiment?
I suppose I've seen people make dynamic interfaces per vlan at the remote site. This way the "default vlan" mapped with Vlan Mappings will match the interface you created on the WLC. These interfaces will basically be "dummy interfaces". I really don't like this config practice, but I think it is acceptable of you want to simply the vlan assignments (if you call it simplifying it...).
This is where you'd use AP Groups to set which interface is assigned to the HREAP AP. But again, the only relevance for this is that it defines the default VLAN for vlan mappings of that WLAN.....