That is actually a good point about the backpack...I didn't think about it but we'll be lugging so much crap that having hands free could be a lifesaver! We have 5 other adults on our flight, but also 3 kids so I can't count on them to help much as extra hands! I'm writing this down
Yes thank god for people able to help!
We had 11 bags and once we got near the exit of the Cancun airport they wouldn't let us use the carts/trolleys anymore, thankfully we still had some friends around us (even with 30+ people on our flight together we got separated) and there would have been no way we could have lugged that all alone!