posted 10-04-2012 11:59 AM
Hi melmas and welcome. I'm thinking that yesilovewine is otherwise occupied, or she would have said howdy...We've only been to Iron Horse once and I do remember that the view was lovely - don't really recall the wines.
Merry Edwards was a tasting in an office setting for us - and the wines weren't to our palate, but we know that others are quite fond of them.
Balletto I had not heard of, so I checked their website - looks like a good choice, I'll have to add them to our list for another time! It looks like Hanna is right next to Balletto, so a logical stop 
We are big Ledson fans - have been club members for a couple of years. They are bound to have something you like, because they have a huge selection. I think you should plan a stop there just to check it out - the building is gorgeous, the wines wonderful and they have a terrific deli with all kinds of amazing mustards and sauces and such. (Our son just hosted an Octoberfest and he made pretzels - used some of the Ledson mustards as an accompaniment for the homemade pretzels and said it was a big hit)
I've heard that the Benziger tour is fun, but we've not done it, so I'm no help there either. We are planning to visit Imagery this trip, too. It has an interesting art gallery which would make it a unique wine tasting visit. St. Francis has a pretty tasting room with a nice outdoor area looking out onto the mountains - very nice view. Deerfield Ranch has you walk down into their cave for the tasting, and that is a nice, somewhat different, experience.
Really you have a lot of very good choices - a good mix of styles and such... you probably won't be able to get to all of them and you will probably hear of some you'd like to visit once you get there, so make plans ahead and then allow for some flexibility once you arrive.
I'm a bit of an obsessive planner myself, but sometimes if a place we visit turns out not to be to our liking and we finish sooner than planned, the place we just pop into turns out to be a favorite. And I know that several folks on these boards have found new, great wineries by asking for suggestions from the various wineries that they visit. And then, of course, come back here and tell us all of the new find!
Have fun planning and researching!