Welcome to OFF.
There used to be a phone number, at their Clackamas office, that you could dial for stocking confirmations. But that service no longer exists and has been defunct for a few years now. It's the old addage of paying more for licenses; and getting less services in return.
ODFW also does not guarantee that any scheduled stocking, will actually occur. And it can happen any day of the week. So the only way to know for sure, unfortunately, is to get out there and find out.
Please share reports and pics of your trips. We love to read good stories and see the fish that get caught and/or caught and safely released.
Happy trails, and tight lines...TD