Long trips, how long would the drive take you?

I typically assume an average speed of 50mph to account for traffic, stops, etc. And about 6 hours of traveling is about my limit before it starts becoming a grind. So when not in a hurry, between 250 and 350 miles is about right for me.

Leaves plenty of time to do some shopping, find a campsite and get setup, relax, have a nice meal, plan the next day, etc.

My most extreme was just this year when I drove 1600 miles over 2 days. Not fun, but I wanted to get halfway across the country in a weekend.