I think all of us at that age know that bad things can happen and we get wiser and more cautious than "invincible" kids are. I now realize why my mother was so worried when I drove coast to coast alone in a crappy little Datsun. But also, when we set out on a trip in our vehicle-plus-home, maybe it's natural to be a little apprehensive until you get underway into the rhythm of the trip..
For me, that feeling has lessened by dealing with the usual unexpected glitches that have arisen the past few years in more than 30,000 miles. They can be dealt with, and somehow it all works out.
Have a great time!