I am another who has to drive some 30-45 minutes to an outdoor range, so I want to be prepared.
I bring a range box to, what else, the range. In it are shooting necessities like balls, patches, pan primer horn (for flintlocks), nipple wrenches (for percussion), powder measures, primers (for percussion) and cleaning accoutrements. Also, I bring tools, both primitive and modern, a container for the cleaning, patch retrieval and dry ball attachments and cleaning patches. I also carry along a range rod.
In my modern range bag I have ear and eye protection, rags for cleaning, a multitool kit, a spotting scope, my primary powder horn, targets, stapler for targets, wet wipes for cleaning me after shooting, water bottle, protein bar, and other odds and ends.
I carry only loading boards, powder measure, powder horn, patches and patch knife, all in a possibles bag, to the firing line.
Ron