No, not until the last Saturday in April (26th). They were fishing illegally. You should report it to Fish and Game using the Suspicious Activity link above.
Why dont they post the season at the access points. I think many people dont know. I was told buy the cleark at the gas station that fishing east of the Island #5 was ok for bait guys is that true?
Just as JT stated, the nice weather brings em out. Hopefully some of the bait dunkers got nailed because there was a warden heading up the road when i left about 3:30. And the fishing was very slow.
The clerk at the gas station was right although east of the creek is hwy 128,he should have said down stream of the island @ access #5,that is where lake Solano begins and Putah creek ends.