Cinta, are you really in zone 6b? That's not terribly cold. I believe the Pinata, mini rose and Drift rose could safely stay outdoors. I have wintered Drifts and minis in pots outside without protection in very cold windy winters. guess I should qualify that by saying they were good sized, established plants. If it's not a ceramic pot, you could still water the plants all winter, just be careful not to soak the pot and turn it into a block of ice.
I would bring Mr. Lincoln inside. My Mr Lincoln that is in the ground dies back to just a few inches each year if it is not mulched well.
As far as covering the pots, don't use plastic. One year I used a big pot set upside down over the plants and that worked. Of course, here, wind will take away any covering lighter than a clay pot.
