If I was remotely thinking about having a dealer perform this recall, I would pay for an extra day's labor of an experienced tech and personally ask her to:
1. Remove both of the valve covers at the same time.
2. Remove the pan and pickup tube.
3. Just before doing the covers, tape off the galleries and blow it all out with air blah blah blah...
The only thing affected by clogged AVCS filters is AVCS.