60 mph is a comfortable speed for me whether towing or not. I'm not retired and do have time commitments, but my vacation time will never be a rat race hurried pace.
I'm surprised I don't see more "bunkhouses" being pulled behind a TC to give the kids and adults some separation. We love the expanse and amenities of the some of the large trailers and fifth wheels, but it would limit us too much where we want to travel. That's why we're working toward a mega TC in the future...
Enjoy your new RV and continue your travels.