Delta - Going for my first time

Hey Guys,

I always ride Don Pedro and have never been to the Delta.

My neighbor is heading out next weekend and asked me to tag along. We live near Stockton so I am thinking he launches from that area. I know some people say its dirty and others say its the best thing ever, but i was just looking for some advice since it's my first time out there.
Should I rent a wetsuit? I never ride this early in the season, I usually go for the May holiday or couple weeks after when the weather and water are starting to warm up.

Thanks