I have three different style bags:
1. Soft tool bag that I use for all my first aid supplies;
2. Three S&W range bags (the ones you get free ... you pay a few hundred for and they give you a free handgun with it);
3. Three slightly smaller cheap bags with no outer or inner pockets.
I stock my S&W bags for each of the games I like to play. One will have everything I need for Cowboy, one will be all set for USPSA, and one for bullseye.
The green bags are used for extra ammunition or misc. supplies that don't fit in the others.
Depending on the time of year some bags will be switched out. In the winter I don't shoot SASS, so that bag will be switched to smallbore.
I have learned that it is much easier to find time for shooting if I am organized and ready. By having the bags all set up, I can grab and go. When I get home from a time of shooting, I try to do all restocking, repair, etc. within 48hrs. By having multiple stocked and staged bags I have learned that I can be prepared and arrive at the range with every possible need - Ear plugs, muffs, gloves, batteries, timers, recorded range commands, targets, squib rods, tools, fiber optic rods, safety glasses, eye shades, ...
I wish I could give better descriptions and sizes, but I have not seen my bags in three months. I can't wait to get my FOID card, so I can be reunited with my toys.