It’s very easy to find a tour bus at Mudanjiang railway station to go to the Jingbo Lake. The round-trip ticket is around 70 RMB. It can take you to get to the entrance to the Jingbo Lake park. I think a 2 days’ tour is enough to visit the while park. Don’t worry about accommodation. You can find hotel in the park and also you have a chance to try the local home-style meals.