I've never owned a roll away so not 100% but I'd imagine they would be fairly secure inside a track so wouldnt rattle. They are quite heavy - not like a garage door - and also the recoil in the couple I've seen are pretty great (opened real quick and hard to stop)
In my opinion again, a canopy would suit nearly every need.
They look good, double the amount of lockable storage, dogs can be in the back with a bit more safety and you just open the side windows. And i would suggest cheaper than a roll away