I'll be heading out tomorrow (Thursday) after an appointment in PDX and should be there around 1pm. I'll try to hook up with others that are already there so we can secure a walk-in group site if possible. I need to cut it short though and will need to be gone by about 11am on Saturday but hope...
I've been to both the Lacy and Lehi, UT stores and I agree that the Utah store is bigger. I could have spent all day looking at the many state records and fish tanks. It was truely amazing.
There are some good topographic websites that provide good detail. Do a search on OFF for "topo" and you'll come across a few that are recommended by our users.