Dennis Wow you guys will a have a great time there that is a lot of gardens to see,I always wish I had more time when I am there so much to see at all those gardens so close together there really is nothing like it seeing 200 acres of fields in bloom all at once is special.
There is another one to add to the list and maybe visit Sister's Iris they are close to Kieth not sure if they are open to the public but if your going to Kieth's, I would ask to visit they sent me some awesome plants last fall and I look forward to visiting there for the 2015 convention.
I am headed to California at the end of April there bloom season is a month a head of ours normally and I want to see some of the growers out there Napa, Supersition, and especially Joe Ghio his gardens are my favorite and he is 15 minutes from the Ocean and by April I will be ready for warm air and Ocean
all are a few hours away from each other and it is another beautiful area to visit in the spring time.