Eric,
The Early Birds crits should be useful. I'll be at a few of them myself for the same reason (not so much to win, but to get my "racing head"). If you really want to pack in (ha ha) some practice, you could do the 8:30 (4/5), the mentoring session, and the 35+ races all in the same day. 5 weeks of that ought to improve your pack skills considerably.
Also: SJBC does still do the
Twilights on Tuesday nights in the summertime, not exactly sure when they start but word usually does go out to various clubs. They also have practice RRs throughout the year which may or may not be as effective as crits, but certainly won't hurt. You have to "join" SJBC ($40) and it's $5/race.
Check your private messages for more info (AV-related).