Sounds like what you're after:
https://bigwavedave.ca/forums/topic.htm ... ton#p57501

Ended up much longer than expected, but here's everything I know:

I'm not naturally well insulated, and I have found a 5/4 hoodless suit is fine all summer at Nitinat. I even wore mine in the warm waters of Baja and found that I only got too hot when I didn't submerge for extended periods of time ...

I'll be going to and from the lake at those times. I'll PM you some contact info in case you're still looking for a ride.