I would go ahead and cold crash your batches for four days and at the end of the second day add your gelatin or isinglass. Most of what that stuff does is cause protein to aggregate and fall out along with some yeast. Even with this there will then be enough yeast left over to cause carbonation in your bottles. Also, dont do a secondary. I would just do a primary at 3-4 weeks before cold crashing, no harm will be done. Do all of the same stuff for your kegged batches as your bottle batches.
"Relax, dont worry, have a homebrew." -Charlie Papazian
"A friend with yeast is a friend indeed."
"Beer is proof that God loves us and wants us to be happy." -Benjamin Franklin