For our trip to Peru we would like to take our backpacks as carry-ons on the plane in order to avoid any lost luggage or delay which could cause some problems for our scheduled trips (mainly because of our trekking equipment). As we have only light hiking gear I am not worried about the airlines' weight allowance. I am concerned about the size of the backpack and whether or not the airline will accept it on board. (We will also have one checked luggage with the trekking poles and other items that cannot be taken on board but which could be replaced if needed.) I should also mention that we will be flying with Air Canada and LAN Peru.
Does anybody have any input on this?