Depends where\when you get tired girl.
All are different.

Some on here will tell you info books? to get off net. and drive accordingly.

Tired at 10am. KIP.

Tired at 9 pm KIP.

Don't watch the clock when by yourself. TOO easy to nod off.
You ain't got someone beside you to give you a nudge.

I've done decades of truck\van driving by myself.
You tired You stop. even if known rest area 10 miles ahead.

You may not get there.

Have a great trip too.

Hi Kazza

Download Wikicamps onto either your smartphone or tablet costs about $8.99 once only charge, download the data base for the States you are going to travel through before you go and then start searching in the likely spots where you think you may like to stop. Covers both caravan parks and free sites and is updated by users constantly, you do not need to be connected to the internet to use this app just update when you are on free Wi Fi.

There are online tutorials showing you how to use this app and you can even have a 2 week free trial can also be downloaded onto multiple devices for no further charge, this app would have to be about the best value you can get.

There are comments  about each site and what the cost is, if not free also photos of some of the sites.

Cheers

David