Question : How would I best do a packet trace of WiFi traffiic

How would I best do a packet trace of WiFi traffic between a wireless phone and wireless router?
Could I use wireshark? How?

Answer : How would I best do a packet trace of WiFi traffiic

See the free Wireshark Jumpstart classes run by Laura Chappell and Gerald Combs (the main developer of Wireshark and Ethereal).

http://wiresharku.com/ (which redirects to http://www.wiresharktraining.com ).
In that she covers proper placement of the sniffer and has many quick shortcuts for finding the data you want. In the one I saw in July while she gave her presentation Gerald was in an IM-type window on the right fielding/answering questions.

You might find it's better to have the 'windows portable apps' version installed on a USB stick so you can run it from just about whichever machine you want without having to install it everywhere, or the U3 version if you have a sandisk USB stick.  http://www.wireshark.org/download.html

wireshark.com looks like a domain squatter has it. They advertise v1.06 for download amongst all the other ads that cover the page. 1.21 is the latest stable version at this time on http://www.wireshark.org/download.html