Karen J. Bannan (New York Times) Parents who prefer to keep the kiddies with them the entire night have options as well. Families pining for warmer weather can fake it at an indoor water park. Two nearby resorts promise water slides and indoor pools, no flight required. The Kartrite Resort in Monticello, N.Y., is hosting its first New Year’s Eve party (rates start at $609 per night for a family of four’s lodging and water park admission), with water park hours extended to 1 a.m. Families can slide into the pool — and 2020 — with a celebration featuring a D.J., drinks and food. On-property activities include a talent show, game night show, fire pit, and s’mores.