There is a great small gear shop in Bellingham called Backcountry Essentials that may have good info. If you visit, make sure to go upstairs and check out the used bargains. http://www.backcountryessentials.net
Bellingham does have an REI store too, BTW.
The Mountaineers in Seattle would be an excellent resource. Second Ascent in Seattle sells ice climbing gear and may have some info as well.
If you are going to WWU, the outdoor rec center rents gear, so tap that resource.
Also see cascadeclimbers.com and nwhikers.net and wta.org for hiking trail info.