Some of the best places to get good jo-jos include (but are not limited to): Smokey's Pizza in Vancouver, WA (sometimes you can get sweet potato jo-jos- yummy), the BP station just off of Yaquina Head Lighthouse in Newport, OR large wedges drenched in yummy goodness, and a particular shout out to the deli in Roy, WA for a particularly satisfying order of jo-jos.
Its best to avoid Fred Meyer jo-jos, as they are not the best jo-jos and will only disappoint you in most cases. A similar experience can be had all over the country by getting KFC potato wedges.
Some prefer ketchup but I love to dip them in ranch dressing.
Having grown up in the Pacific Northwest (Portland, OR), I find that I really miss the beer and the jo-jos.