Hello
Susan
The pond liner I am talking about is this
I picked it up when I redid the lower pond it has no leaks but I doubt you could get it in a explorer.
But it would be perfect for the fish until your pond is done.
In transport bins will be fine.
if you can transport in there pond water (If it is good quality) would be great.
I think you are on a 3 hour trip so in those size bins I think you would be good with 3 per container for the adults.
And the babies you should be able to double that for the trip.
I would not worry about heating them as they are cold water fish and are used to the temps
The plants I would put in a separate bag or box and just keep them moist/wet.
I would also recommend that if they are still feeding that they stop feeding 2 or 3 days before you pick them up.
This will help in transport and them not pooping in the little container.
Oh I have Turtles to and my big koi just push them aside but since I have had turttles I have not seen a baby where before I had them.
So it is good that you will keep them separated as in tight corders the turtles good cause some damage.
With all those extra tanks and filtration you should be in good shape try to get them setup and circulating before you get back
And as Capewind said do a lot of testing as everything cycles.
Ruben