The best way to reach Koh Jum is by one of the twice/daily ferryboats between Krabi to Lanta Island and the twice/daily ferryboats between Phi Phi Island and Koh Jum , both which makes two stops stops in front of the resorts at  Koh Jum and Koh Pu. Longtail boats from the resorts come out to greet The SuperConcorde and take you to your resort. The other way is by bus or taxi from Krabi to Laem Kruat and then by taxi-boat over to Baan Koh Jum or Baan Koh Pu. That's the long and wrong way during high season, but it's the only way to get here during the rainy season as the ferryboats stop running when farangs stop coming in the late Spring