Rio de Janeiro
I was thinking if all ice flows are arranged to allow for a continuous movement from start to finish, Heres is my question : if I could pick up and drop ropes/fish without violating the three units limit , could I make mulitpul jumps from flow to flow until I cant move anymore and perhaps reach the other side?
Yes, as long as you have picked up all fish and ropes in previous turns. Remember that you can only pick up stuff at the end of the movement.
Also there is only one backpack card for three explorers. (Meaning only one backpack for only one of your explorers) does this mean that I can only have one explorer in play at one time until reaching finish.?
No. The backpack is shared by all of your explorers. It's a game, not a simulation.