Taking two children 20 mos and 4 yrs. I really don't want to haul our huge double stroller. I have a nice lightweight single stroller that has seen WDW before and handled quite easily. My Dilemma: Second stroller option? I would like to find an umbrella stroller for the 4 yr old that is compact enough (and cheap) to hang off the currently stroller and/or fit underneath when not in use. I really don't want to rent another stroller, as two strollers during a ride swap would be difficult for one person to handle. Suggestions?