I 2nd Scott's nomination if you REALLY don't want to do it yourself. You might want to wait for a KLR tech day and have someone show you OR you could make the Hells canyon meetup (June. Wallawa jamboree thread) and I will do it for you!
If you do it yourself D&S cycles in Aloha will do a free shim exchange for you( they'd also be a good bet if you just want to pay someone.
Also I would personally sweat the doohickey more than a valve check, like Peterman said you might not need an actual adjustment for a lot of miles yet (not suggesting that it not worth checking at all but you'd be REAL unlikely if it caused an immediate problem IMHO).