I have a roller bag/trolley. It’s a battered railway-issue bag I’ve had for a little over a year, and it goes almost everywhere I go. People comment on it as though it’s funny: they can’t imagine why I need to take it everywhere.
I consider it an accessibility aid for anything that involves leaving the house.
I have things I need to take everywhere with me. My wrist and thumb splints, because my pain is something I can’t plan, and being in pain at work without a splint is a nightmare. A thick hooded jumper, because my hypersensitivity to cold means that waiting at railway platforms at night is agonising. A woollen, hooded scarf, ditto. A large tub of Play-Doh, for stimming. A bottle of water, for timetabled and non-timetabled medication. An umbrella, because I live in Geelong/Melbourne where we can get five seasons in a single day. Lunch, if I’m going to work, because I can’t afford to just buy two meals a working day on the hours I get.
I’ve also got optional things I take everywhere with me, like my netbook (I use all time I spend on trains), deck boxes and a dice bag (you never know when you might run into someone and regret not having a deck on you), a playmat (this makes it so much easier for me to pick cards, even sleeved cards, up off the table) and other odds-and-ends (wet and dry tissues, nail scissors, deodorant, a tape measure because the Warhammer players never bring their own and sometimes the store one gets lost). Yes, I have the bloody kitchen sink, but you’d be amazed at all the times someone has needed something I just happen to have.
I also have a rainbow-striped satchel over my shoulder for absolutely-bloody-essential things like wallet, headphones (I need something to drown out the noises made by other people/traffic/trains), coin purse, meds, bandaids, notepad and pen. A satchel bag where I can just reach in without pulling the bag off a shoulder and unzipping is so much better than a backpack, even if a backpack is less gendering.
I also need, quite simply, a place to put anything I buy.