Hi Helen,
I'm not sure which question you're referring to. However, I do know that pulling items with wheels is a big no-no at WDW. You can check out the list of Frequently Asked Theme Park Questions found on the official Disney World website
HERE. Near the bottom of the page you'll find the following information:
Are there personal items not permitted in Disney Parks?
Guests
are not permitted to pull items behind them. Any item that requires a
Guest to pull it behind them, including a stroller, is not permitted
into Disney Parks. Other items that may not be brought into Disney
Parks include, but are not limited to:
- Items with wheels, such as wagons, skateboards, scooters,
inline skates, shoes with built-in wheels, two-wheeled or three-wheeled
conveyances, strollers larger than 36 inches x 52 inches, suitcases,
coolers, or backpacks with or without wheels larger than 24 inches long
x 15 inches wide x 18 inches high (coolers required for medication may
be stored in a locker or at Guest Relations), and any trailer-like
object that is pushed or towed by an Electric Convenience Vehicle
(ECV), wheelchair or stroller
With this in mind, I would certainly not bring a rolling backpack to the theme parks. If you have lots of gear you're bringing to the park, you could rent a locker to store some of it during the day. Another alternative that I have actually seen some guests do is to bring a stroller for your gear, even if you don't have a children or if your children are past stroller age. You can get a bottom-of-the-line umbrella stroller at discount stores sometimes for as little as $10-15. You could set a backpack in the stroller and push it around, you just can't pull anything behind you.
Happy travels!