help setting up unifi ap onto sonicwall network

Hi guys,

Im trying to find some guides or documentation for setting up our new unifi ap onto our sonicwall network.

I have a nsa 5600, and a unifi ac/pro ap.

Sonic points are pretty straight forward to me, but im a bit confused about how i'd add these unifi devices.  It seems to me that these would go on their own interface using 2 vlans 1 for guest, and 1 for internal traffic. But then i came across a video that said you should add them as vlans under the lan interface.  This doesn't seem to make sense to me though because how would i separate the guest traffic from the lan traffic if its all running under the main lan interface.