Are you a superclyde as in 400 lbs? Or super as in you wear a cape?
How many days in a row can you ride 60 miles right now? (and how about your mom?) Note that I said average - most people also schedule a rest day from time to time which will bring your average down. If you're a fast rider doing centuries on an unladen bike, figure about 6 hours a day of nothing but riding plus two hours or so of breaks in there and you'll be wiped out. Then you have to find a camp, pitch a tent, eat, blah blah blah. However, you won't be riding 17 mph on your touring bikes, in all likelihood.
Go here for some dudes touring long distances on bikes and see what they get up to:
https://www.crazyguyonabike.com/
Take indyfabz's advice and do a 3 day tour this summer to debug your kit and evaluate your readiness.