Kind of no different than when you travel far enough that you will be finding a place to stay at night. You may not directly itemize those expenses but you will include them somehow in what you end up charging for the job as it is a cost related to the job.
I generally start tracking time when I start loading supplies to take to said job. Often there may be more time involved where I may be answering phone calls related to other clients or other business or even personal aspects, or still spend a little time putting away things from yesterday's job, or whatever not related things come up. So I kind of adjust that time to what I feel is fair if it isn't time totally dedicated to the one client. Travel time also billed to the client, but then also run into times where I don't go straight to their place and maybe make some adjustments as I see being fair.