The festival takes place during most of April. However, the bloom dates are very much dependent on the weather. And with between 300,000 and 400,000 visitors it can be quite hectic getting around (some form of transportation is necessary) and parking along the roadside is mostly forbidden.
Consequently, I try to go a few days before the official opening of the display gardens. Most of the fields are in bloom then, and the bulk of the visitors will not have arrived and parking restrictions are at a minimum.
If you’re coming from out of the area, it’s about a 1 1/2 to 2 hour drive North from the Seattle airport depending on traffic through the city. There’s a very good chance that the skies will be overcast this time of year and once you walk off the pavement you will be in mud. The fields are rotated each year and some will be fallow. So you will have to go up and down the roads to find a ‘background’ for your scenes.
I’ll be going up the week before to see which fields are planted in front of barns, sheds, etc. and I’ll post my findings here in early April. I’ll also let you know what days I’ll be shooting in case anyone wants to get together. Drop me a Comment or email if you are interested.