Plannig our next trip in the USA

It's going to be a week. We will be traveling to Idaho for a wedding. We are taking our tent, small camp stove, coffee pot, sleeping bags, air mattress, and a few other small camping needs. I will have a nice outfit for the wedding, the rest of my clothing will fit in my day pack.
The most expence part of this trip will be the gas for my car. We will check the oil, water and air in the tires before we leave to make sure the car is in good shape for this trip. Don't want any suprises down the road.
We will be eating out, we don't cook much in camp but need our morning coffee.
We have started getting everthing togather, it's still 3 days away before we leave.
We have been on line checking out camp grounds along the way. We don't make resevations at the camp grounds as we want to be flexable as to were we will be staying.
I am in hopes that most of the campgrounds will have yerts. Even with our air mattress the ground is hard.