We visited Palio Khao Yai in January when the weather was just wonderful. As you are a bit higher than in Bangkok the temperatures are always a bit more pleasant. The area offers plenty of places to stay. The Juladis Resort is just next door and a bit down the street you find plenty of other options. As Geomark commented at Palio Khao Yai you now also can find a place to stay. More into on this place you can find here.