we're doing a renovation in MA, and are still most likely a couple weeks away from pebble (I'm hoping it's done before 2 weeks from today - if not sooner). We (and the previous owners) have always closed the pool mid-October. As frustrating as it is (we just had almost a 1 week delay due to the masonry crew being out sick) - I think you've still got plenty of time. We are planning on keeping things going for about a month after we refill the pool to balance the water, etc. The PB recommended not bothering to put salt back in until the spring (just watch the FC level and add bleach as necessary). I'll probably end up closing late October, and I'm not too worried about that. Hopefully with the trees we've cut back we won't get many leaves in the pool.....