two days of wine tasting in sonoma county

hello!

we're going up to sonoma in a few weeks and our base for the night will be healdsburg.

we both LOVE pinots and zins and plan to hit at least six wineries a day.

are there any MUST trys in the sonoma area (the russian river, dry creek, and alexander valley areas)? we're pretty familiar with all the different areas.

any suggestions would greatly be appreciated!

thanks!