Visiting Sariska from Delhi is very easy and comfortable. You just have to take a train to Alwar. You will reach Alwar in 2 hours 30 minutes. There are many trains. From Alwar, you can take a taxi or bus, which will take e1 hour to reach Sariska. Go for RAJASTHAN TOURISM DEVELOPMENT CORPORATION hotels. The rooms start at Rs 2000 with breakfast and have swimming pool and bonfire arrangement as well. The national park is just 5 minutes away from the hotel. Go early morning to spot animals.
In the day, you can go to Bhangarh Fort which is 45 minutes away from the hotel. You can return to Alwar which is 2 hours away from Bhangarh Fort and catch the train.