If I don't carry a bag, I don't carry much if any of that stuff, either. Also, if the condom is for waterproofing, you must have a some pretty small lens
What are your 10 Camera Bag Essentials you carry to every shoot (well at least when you take a camera bag)?
I don't carry any of this stuff. Just my camera and some condoms.
OMG, if you saw all the crap I carry with me, it would blow your mind. But most of it stays in a trunk in the car. In reality, I carry quite a bit of "trail necessities" in a North Face Fanny Pack. All the misc hiking necessities like 1st Aid kit, compass, head light, bright flashlight, etc etc etc etc. Then I have a few things like mem cards, batteries, etc in my cargo pants. Finally, I have a basic cheap daypack (won't draw attention to me carrying camera gear) with a couple lens cases with extra lenses, lens cloths, filters/polarizers, misc tools, rain gear, baseball cap and large Tilly wide brim sun hat, etc. The only thing that causes me to carry an actual top loader camera case is when I carry the 70-200 f/2.8 monster lens which takes up an enormous amount of room. Fortunately, I don't walk around with that lens too much on campouts or summer camps. Finally, I always have a Nalgene full of water tucked somewhere, either hanging or in a side pocket of the daypack.
Something else that stays with me all the time... Large carabiners and a bungee cord. These are used to hang my daypack and/or camera from a high place, a tree, under an overhang, whatever when I stop for a while. It keeps it away from all the scouts running around, it won't get knocked over, spilled on or otherwise damaged. I cover it to keep it dry if necc. It's always within eyesight and since I'm at private scout camps, I don't have to worry much about theft since it's usually just us anyway. In public places I have to be a bit more creative or careful.
Garbage compactor bags are a good idea but another good idea is TyVek. If you can get a good sized piece, wash it a few times to soften it, it's super durable and comfortable + easy to fold and pack and it's super light.