According to dell documents checking this will: "disable the Wireless Broadband Router from sending out beacon packets to the wireless network and is unchecked by default; other users can easily find and  make associations to your Wireless Broadband with the use of a a site survey tool. If you want to increase wireless security, you can enable this feature."

I checked it without any problems.

Yes you are correct. If you check "hide my wireless network" it'll hide your network so no one will find your network, You said you have WPA working, which is the best way to protect your network as well.

I have a 8600 and the 2300 router, and i'm not sure how to get it setup, any suggestions?

Hide the network (prevents others form seeing it.)

Disable the ping

change network name and password

this site has instructions for enabling wpa security.  you must download the patch from microsoft when it instructs you to.  however, you do not need to update the truemobile 2300 firmware.  I followed this site and was able to set it up with no problems.  Just remember to do it from a desktop computer since the wireless network will be down while making the changes.  Also you need to change the settings on your machines that are wireless to match the router changes.

Hope this helps.

http://www.pcmag.com/article2/0,4149,1277020,00.asp