As of last weekend, there was 2 feet of ice on K of C Pond, which is about 1 mile away from Plainfield Pond, so I would think (but obviously cannot guarantee) there should still be sufficient ice on Plainfield Pond this weekend.
However, as PMaloney said, you may have some difficulty getting on the ice because the edges go first. There is a good chance that any gap along the edges might be "plankable," but, again, I cannot guarantee that.
