Ok, I tried to translate the rules, but prolly did a rather poor job since there were many words i didnt know.
im not trying to translate the complete novel they wrote in german for the expansion but merely try to sum up the main points:
double-canoe: one of your boats can now load 2 gems, which means you can also steal up to 2 gems. You move those canoes the same way as the others.
Swirl: no canoe can stand on thr swirl. Ends your move on this field you will float down another field. You cant do any moves which have the swirl as goal if you have points left. If the swirl is directly on the field before the fork you can choose in which direction you want to float. To overcome the swirl when you move upstream costs one point extra. If the swirl falls down the waterfall it will be brought back into the game immediately. The effects of the swirl are already calculated in the possible moves, which the games shows you.
New cards:
card 7: you have 7 points to move your canoe
card 1/2/3: you can use 1, 2, or 3 points for ONE canoe
card rope: With the rope you moor both canoes to the land and they wont be moved this turn. The movement of the river doesnt float them downstream and they cant be stolen from. After the river movement they start the game from this position unless the swirl ends up on their field, then they float down one.
like the cloud, the cards rope and 1/2/3 will be ignored when the river movement is calculated.
Bathing Beaver: As soon as the cloud is on +2 the beaver jumps on the first river field. He will float downstream with the river and as soon as he falls down the waterfall (poor guy) the weather will be set back to 0
Express Elk: If your canoe is at the lowest tile, where the pink gems are, you can take the Elk with you. The Elk adds 2 points to the card you played, but only for this one canoe. You keep the Elk until you come to the landing stage or fall down the waterfall. Then the elk will return to the pink gems and can be used again. you cant steal or give away the Elk.
If you play rope or cloud you dont move any canoes, which inlcudes the canoe with the Elk. It IS allowed to take the Elk before you set the weather or moor your canoes, though.
Thats it.
LG
Jocy