Hmm.... The way I had them in the cooler I had insullated rows of ice; jello stacked in rows then between the dividers; ice em up! They were still cold after 4 days and I never re-iced them; I'll ponder on site though. If I premake, then that's just less stuff to have to take. With my roomie's restaurant; it took me only 2 hours to make near 400 of em.
Thanks for the input, Connie!