If you have either a Crock-Pot or Instant Pot and can squeeze it into your vehicle on your trip, this may make your week a whole lot easier! I don't know about you, but when I'm on vacation, I really don't want to spend my entire time cooking. Pay close attention to the forum posts regarding meals and what to eat. There will be lots of ideas for you if you have either a Crock-Pot or Instant Pot!
Here's another thought. Have you ever considered using a meal plan sheet? If you haven't ever tried it, it's a great way to have your week organized and ready for grabbing the necessities before you leave the last big city with the grocery store on the way here.
What I like about this one is that you can write the date in each of the colored boxes by the day of the week, and there's a shopping list right on it as well. If you're going to be sightseeing one day and don't need groceries for that day, just mark that down under the day of the week. On Wednesday, for example, just write down that it's the Resort Potluck and what item(s) you're going to bring to share. This meal plan will require a bit of forethought, but man, it will make your week so much more enjoyable!