Here you go, right from the horse's mouth:
http://www.buckknives.com/index.cfm?event=why.plantTour
"TAKE A TOURCome by and see how Buck Knives are made.
We offer tours year-round, free of charge Monday through Thursday at 10:00 a.m., 12 noon, and 2:00 p.m.
Tours last about 45 minutes. Fully closed shoes are a must (closed toe and heel). It is a knife factory, after all. Children seven-years-old and up are welcome.
Please call ahead for a reservation, 800-326-2825 x172.
We are located at 660 S. Lochsa St. in Post Falls, Idaho (between Spokane and Coeur D’ Alene). Take I-90 to Exit 2 (Pleasant View Road), go south to Lochsa, turn right and follow Lochsa to the plant. Visitor parking is available."
Here is a link to a video of some of the factory and process:
http://www.youtube.com/watch?v=ey_ZdF1PwbY
Collectors here can help date your knives. If you post a separate thread asking for date information with pictures of the tang stamps, knives and sheath(s) collectors of those models will be along to assist.