What are Huck’s motives in rousing Jim and getting away from the island? (CH 7-11)

The old woman guessed Jim was hiding on the island. Huck is finally able to extricate himself from the woman and immediately returns to the island. He tells Jim to grab everything and put it in the canoe. Together they shove off, after piling their belongings onto the raft, which they then tow behind them.