SMC Gateway and DHCP Reservations

Do the SMC Gateways not have the ability to create DHCP reservations? I am about to set up some cameras on my network and want to use DHCP reservations so that I can access the cameras from outside the network without worry that the IP address of the cameras will change.

Or is this something where I need to have the gateway put into Bridge mode and then use my wireless access point as the DHCP server?

Thanks,