The 2011 wifi "standard" configuration uses just
- the Classmate wireless
- the white KOP D-Link on the robot (in AP mode)
Other configuration options exist depending on what you want to get out of life, but that's the basic setup.
At Competition we get the addition of the FMS Field AP, so we turn all our individual team APs into bridges instead.
If you want to "Practice like you want to perform," then you can add your old Linksys router to pretend to be the Field Router. It won't be the same of course, because the field setup uses different equipment and virtual private networks for each team, network switches between the Classmate and the Field Router, 60' of Ethernet cable, network monitoring software, and a Big Brother FMS, etc.