Setting up Plex/Sonos with Airport Extreme and Sonos Bridge?

Hello fellow Plexers,
Exciting news with the Plex meets Sonos feature... I intend to set this up but run into an issue. I have a Sonos bridge connected directly to my Airport Extreme router, and Sonos Bridge instructions indicate to set the router in bridge mode. This seems to prohibit me from getting Remote Access configured ('Not available outside your network' message; Private and Public indicate unkown IP). And a router in bridge mode appears to restrict me from setting up port forwarding and DHCP reservations. Anyone out there encountered and resolved this?
Thanks, Matthew