i went to 大青山... it was worth the visit.. but we had to walk alot..its ok..if u have private car but if u dont than u can also rent it from outside.. bt there are many people who ask for more price so be careful.. and if are willing to walk.. than after walking for about 40min you will get bus that is for free... there are also stalls that sell many things.. and also there is washroom beside the beach where u can change there is also locker available.. hope the review will be of some use..