I've been using Tuxedo bags for years.
The tom bags are pretty easy to get the drums in.

The Bass drum bag is a whole different story.
The main reason it's hard to do is that the lid of the bag doesn't zip all the way open. So, I have had to turn the Bass drum over and fit the bag onto the drum.

The P.R. bags zip a lot further open and are more ridged which makes it much earlier.