Was that a Hiko tray like this you were talking about.
yup, them's the ones. If I was only doing 15-20 clones I would just transplant them into beer cups but when you start dealing with hundreds of clones these Hiko trays rock, so easy to pack around in the bush, I just put them in appropriate sized rubbermaid totes and away I go..on my frame pack I can carry two boxes on my back and one in my arm, so in total I can carry 124 clones at one time..pretty damn slick if you ask me!
I also like the Hiko trays because the clones are packed together so they stretch and become healthy foot tall clones really quickly. At first I thought this would be a downside but it gets them nice and tall really quick with alot of internodal spacing, as soon as you transplant they go nuts and bush right out. Also if you wait until they are just rootbound they're really easy to transplant..a nice little solid plug of roots.