I haven't been here, so this will be an adventure! This was also recommended by a great member of our meetup group, and many positive reviews on Yelp :-)
The Japanese Gardens are inside the Central Park of San Mateo, near a Recreation Center, and are surrounding a pond. The San Mateo Arboretum rose garden, native plant garden, and butterfly and hummingbird garden are all right next door.
We will meet right across from where Laurel Ave meets 6th Ave, in this view provided by Google Maps, at 2:00pm on Sunday (see here for a birds eye view of the gardens in the park). As far as parking goes, there is parking on Laurel Ave itself, and also at the parking lot for the recreation center. There is also parking underneath the tennis courts. I'll probably arrive early and scope out the parking situation, so if anyone has any uncertainty, call me [masked]).
Note that the park closes at 4 for those of you who might consider coming late. Please call or text me if you have any uncertainty about where to meet or the whereabouts of the park at any time.
Will look forward to getting everyone out and having a good shoot!