Sounds like a nice day Sunday, and the cherry blossoms will hopefully be just coming out - at least, forsythia is already blooming. If we get there early it should be easy to park on one of the streets very near the central circle on Brookside Drive. Later it often gets crowded and may be necessary to park further away.
The middle of the traffic circle will probably be the best place to work from. It's a large sunny area. Or you could work next to the stream that runs down the middle of Brookside Drive.