See if this helps. This is how I've run offseason events with the old 2009/2010 router/bridges.
The DLinks are similar (you'd have to set them to Bridge mode-WPA optional), but I haven't tested this configuration with multiple DLinks yet.
I have used it with a DLink in a mixture of bridges, one each from 2009, 2010-replacement, 2011.
You can also eliminate the Ethernet switches and go wireless from the Driver Stations to whatever you use as the field router, as long as it's capable.
I lean towards Ethernet cabling/switches to avoid potential connection issues with odd-ball laptops used by teams as Driver Stations, and since pit tethering vs. field connection will keep the Driver Station switching ports it'll drive teams crazy...
Careful when you first setup the router/bridges. The router tends to remember old IPs from before they were changed. Just give it time and cycle the router power after all the Bridges and laptop IPs have been changed.
