If they are not travelling a long way, then with a large enough bag, all of them will be fine.
If they are traveling a long distance, then I would do 2-3 baggies.
Last month, I shipped 20 fry from my home near Montreal, Canada to southern California. I had them in 4 bags of 5 with bag buddies. It was 2 day guaranteed delivery.
Longer distance, I would recommend, not feeding them for 48 hours. Less they are fed, less waste and chance to create toxic conditions in the baggies.
Bear in mind as well, shipping can be quite expensive to you before you send them...this time of year it is essential to use heat packs to pretty much anywhere. Factor the cost of supplies into the shipping cost.
Have you tried selling them to your LFS?