I've spent a fair amount of time on the highway this past summer, and have made a habit of enjoying a pipe or two on the road. Pack and light the pipe when I stop for gas (not at the pump), then continue on my way. I generally just tamp it quickly with a finger since the tamper is a two handed job. I have a go-to blend for the highway that stays lit nicely, so relighting usually isn't a problem, plus it goes particularly well with black coffee! I find it relaxes me nicely, so I'm quite content to go the speed limit, and don't even care if I get stuck behind someone going under the speed limit.
As a bonus, earlier in the year, I took up cigarettes again for a couple months. Even after quitting, the smell just wouldn't go away regardless of what I sprayed. Then I had a couple pipes on a weekend getaway. Took about two weeks for the pipe smoke to completely clear, but when it did, the cigarette smoke was gone too!