Good point, Chris. I didn't consider it free as there is an expectation of a purchase. It was the purchase amount that I was really curious about.
I stayed at a winery this past Saturday night- the "free" night ended up costing me $43. There was 2 wine tastings (and glasses) at $9 a piece (wife and I), then a $20 bottle of wine, and then $5 for a tip. We enjoyed the experience and found they were friendly to us having our kids with us (12 + 3). The lady pouring our flights of wines interacted with my son and made it fun for him. Afterwards, we walked the property a bit to get some exercise and the kids drove their R/C truck around. The cost was a bit steep for what I wanted to spend, but we're newbies to wine + tastings - I literally didn't know there was a cost associated with it.
I'd happily stay at a winery again... just not when the nighttime temps are going to be in the low 30s. Something's up with the camper as it pillaged my battery with running the heat.