Is it possible for this creek to ever flood into your lake? If it does, then it doesn't matter what you put into the lake because you will get everything that is in the creek.
How will you manage Eurasian milfoil? You will certainly get it. I've seen very few emergent plants in sand pits. Are you going to plant any?
This question is probably for Dave Willis. Is a sterile sand pit one of those rare exceptions in a northern pond where fertilizing might be appropriate?
Are you going to stock small or large fish? Do you have any suppliers lined up yet?
To me, these questions need to be answered before you go on to what fish to stock.
