Jansport is made in China and Thailand

Maxpedition is made in Taiwan IIRC

The North Face products are mostly Chinese made

I've seen Camelbak both as imported and Made in the USA, so it most likely depends on the particular product.

You're right though, one way to determine where the packs are made is whether they say "Made in the USA" right up front. Then again, if you read my previous post, it may not be the case. The garment/sporting goods industry is, in a lot of cases, a dirty business.