Use a gateway of 192.168.10.1 and a netmask of 255.255.252.0. Pick an IP address somewhere in the range of 192.168.10.2-192.168.11.254. If you get a message about a conflict, change to something else.
Why a wireless LAN that's NAT'ed and sits in RFC1918 space, with literally millions of IP addresses available to it, is having issues providing enough IP addresses for the subset of 1500 attendees that are using wireless is beyond me, but this is how I'm protecting myself from the DHCP Server Madness. Maybe at some point they'll open up the DHCP server to use a larger subnet or something. I mean, 192.168.0.0/16 gives them 65K addresses to use, but they are only using 512. :-/
Actually, picking random (and other people's) IP addresses bones the network. Thanks for the help