I owned a Burley for my kids that I often used to haul stuff. It was pretty easy to open the front and back, and stick in whatever I wanted. Once I even took off the canvas-type cover to haul something a bit bigger but that took a bit of effort if I remember.
I sold it years ago when the kids were too big to haul in it. Now I have a Burley Nomad for its lower profile.
Regards,
Gary