FYI. If this is your first year and you have not visited the Radio Telescope that is just east of the Prude Ranch, you should go visit it. It is one of the observatories/facilities that could be slated for closure with the coming budgets that have been proposed via NSF/NOAO/NRAO etc.
You get to it by taking the road on the east side of the ranch... Sproul Rd. I made it up to th dish with my Prius back in 2011. I missed the workers but they have given free tours if you can catch them.
Wow, you are so right about recommending this. Talk about free tours! This was not a tour, but rather a complete inside and outside look and explanation of the whole thing. John Wagoner, Mike Planchon, Chaz Hafey, and I hiked over there one morning a few TSPs ago and they let us climb wayyyyyy up in that baby. It is not for the squeamish about heights (which I am a little bit but I was too stoked to think about not goimg up). The old guy that ran the scope singlehandedly had to climb up into the dish to work on it regularly, which really amazed me (like being a trapeze performer almost). It was an amazing experience and I will always remember it even though I'm not particularly into radio astronomy. EDIT - after I saw the photo of the engineers in the dish, which was awesome, I wanted to say that I think that they sometimes have to go in there when the dish is tilted at a sharp angle, not horizontal as in the photo - thus my amazement at the 60-something dude going in there regularly, incl. when the dish has ice on it.