I am planning to rent a hatchback sedan with a private driver to visit Khao Yai from Bangkok. Expect a full day trip (10 hours) to visit the quieter scenic side slightly away from Bangkok. Best if you want to have a relaxing stroll away from the city with flowers and cute animals. Bonus if you're into Ins photos. Itinerary (also open to suggestions): Movenpick Resort, Primo Piazza, Hokkaido Park, Rancho and Trot Cafe, Blossom Bloom.