I always split, label, and count before I list seeds as available for swapping.
I like to postpone packing up until after trading closes. That way, I only have to openn up each tub of seeds once, and can pick everything I need for that swap in one pass.
>> I was going to get a jump start ... wanted to stay ahead
But that is smart, too! \
After the current swap I'm in (DnD's swap), I hope I have enough time to keep track of and RECORD how many of each type are left over after the swap. Then I won't have to re-open tubs and re-count for the next swap.