Thanks everyone for the tips and good discussion. I think that my unease was also due to the fact that I was planning on being able to communicate to be able to send and receive information from my house, where we had left our two young kids with family members so that we could take this vacation. It was the first time in over 3 years that we had been able to take a vacation, so I was already anxious about leaving my kids, and this didn’t help.
Good point on the paper map! I forgot to mention that I had packed my 2015 Rand McNally Atlas. Sure, it’s old, but I knew that it would be good enough in a pinch. I was most worried about getting a flat tire in a remote area, so I had also packed my own small floor jack (don’t trust those scissor jacks) and an extra set of tools, plus a small tire inflator. Thankfully didn’t eed those!