How do you begin to plan for extended road trips?

We’ve found that 300 miles a day is too much. My days of seeing how long I can go are behind me. Others will go farther. We figure 50 mph is a good number counting stops for biological, food, fuel needs. Don’t like getting anywhere after dark, or feeling rushed to get somewhere. A two night stop every couple of days gives time to rest and see some along the way.