I use to carry a bag full of crap (have two bags full actually). By the time I quit gigging I had a key in my pocket-no bag. I always brought two sets of sticks, and brushes or mallets only if I needed them. I brought some tape-which I can use to hold stands, or tone down a cymbal, or tone down a tom. And I'd bring any charts I had written for complicated stuff. That's about it. Less stuff to carry the better.
Although my setup got bigger over the years, my stickbag scaled down haha. Not using other sticks, hotrods or brushes at the moment.
I use a Vic Firth Essential Stick Bag which hold 4-5 pairs of sticks. I 'mount' it on my snare so i have easy access to it from both sides.
Since i switched to 2B's this year i have 3 pairs in my bag; 2 reserve and one pair that i use.
Oh and a drumkey is in it as well.
my drum set bag (old black and yellow Drumslinger) has:
Vic Firth 3A's
Jeff Hamilton brushes
old Vater Acousticks
concert band/community band bag (big ol' Innovative Percussion) has:
a ton of Innovative Percussion keyboard mallets
old Black Swamp bamboo shaft tympani mallets of all weights
Zildjian Steve Houghton brushes with the puffy thing on the end for cymbal rolls
Cooperman Graham C John's snare sticks
Innovative Percussion Lalo Davila snare sticks