I would like to travel to chang bai and adjoining areas from changchun city along with 5-6 person

it will be a 2-3 days trip along with families. can you please suggest me the best possible way to reach there and return to changchun, a good hotel with reasonable price and the itinerary. Also please advice some method to reach the heavenly lake, the beautiful park from the hotel and if there is anything else to enjoy. thanks in advance.