Please forgive this silly question but I've never fished at a farm where the workers bagged the fish. Are they cleaned, that is gutted? If not, you want to do that right now (written in the wee hours of the morning following the catch). Some may argue it is already too late. I'm assuming the workers cleaned them for you.
I think Caine is overly conservative on this one. If you've only got four beautiful fish caught less than 24 hours ago, why freeze them at all? If it is just two or three of you, why not cook all four today. There might be one left over, which shouldn't be leftover very long.
Or you could cook two today, and freeze two today, using whatever lessons were fresh in your memory to improve the second attempt, while the first was still fresh in your memory.
Anyway, welcome to the website and thanks for asking the question.
More folks smarter than me will probably reply soon.