Did you let these pollinator together? If so its not too critical in terms of selection. You could always save seed from all individual plants. Name them and include description of charactersistics. Then plant out a trial of each individuals progeny. Record obs and select the best performer from that test for mass planting the following year.
Discussion
Maybe this is already what you aredoinfg lol?!
It is what I am doing. I am in the fortunate position that all the plants are healthy, Productive and tasty. In addition I would not say it was a particularly favorable year for melons here. It is kinda what I’ve been working towards for 4 years. And it’s hard to believe the selection is largely based on taste and size. But I do save seeds from every plant just in case I want to go back to it.