This is coming up. The part that interests me is that

"The campaign continues at this year's festival by bringing cherry tree experts from Japan to Seattle to teach Washingtonians about the proper care and maintenance of cherry trees. The cherry tree experts will give instruction during the festival and the week that follows."

I've never been before, and don't know details. You just show up sometime during the weekend and see what's going on, find your way around?

Here is a link that might be useful: Seattle Cherry Blossom & Japanese Cultural Festival