It is important for us to have an idea of the numbers of people expected at a particular winery and the timeframe in which you might arrive. Our licensing and DA stipulate that we can, all, have only a particular number of people onsite at any one time. The scheduling provides this information to us so that we can provide everyone with a great Long Lunch.
If you do change your mind about the winery order, it is up to each winery if you are able to get in and will depend on the number of people they have onsite. The downside of this is that you may not get in if the alternate winery is at or near capacity.