This is our first trip with kids to WDW. We will be taking two Maclaren's for my daughters. I am planning on having a backpack stashed under one of them with extra's- dipes, sunscreen, water. I will take everything of value with us on the rides. Has anyone had any trouble with people stealing things that were left on the stroller? I just don't want to have to lug a backpack onto the rides with us. We were thinking of running a bike lock through the frames of the two strollers to lock them together (but leaving the wheels so they could be pushed) and I suppose we could attach the backpack to it. I hate having to be paranoid about things like this, just wanted to know if this sort of thing has been a problem for anyone?

in the bag they were about to steal, this would deter them! 
. But some people do take things from other peoples strollers.