I'm wondering how safe you all think it would be to leave dd's 7x7 Creative Memories album that we'll be using for an autograph book, in a backpack in our stroller while on rides. I was thinking of using a little luggage lock to lock the backpack, and then run a bike lock through and around the strollers wheels and around the backpack so if someone wanted to take it they'd have to pick up the whole stroller and carry it away. Then all we'd have to take on the rides would be camera and wallet. What do you think? Thanks!