Vickie,
Email Dan and tell him you want to get put on his mailing list. He usually mails out a postcard of the days in July when he has it. On his main page of the website, he usually has tentative dates, but the card will have dates 'set in stone'.
They let customers use their first floor 'bathroom', if and when you need it, as I do.
I always feel like a 'kid in a candy store' looking at all the daylilies when I there and when they're in bloom!
There are some pics of their place that Cailf Sue and I (not together) took and posted on DG. She even got a pic of Dan! I'm Marilynbeth on DG. I mostly use DG now just for the Garden Watchdog.
Take a cooler of beverages and snacks, that's what I do. If you want to spend a couple of days looking around, there's a small motel close to his place. Think it's still Knights Inn.
Any more questions, feel free to ask!