I don't think I'll stop traveling solo for a while yet (I'm 68). I've always traveled solo long distance, driving from Syracuse to southern Maine in my early 30s, from Michigan to southern Maine (with toddler DD in tow) in my late 30s/early 40s, from PA to southern Maine in my mid-40s. DH was a grad student or just too busy as a faculty person to take the time off; if I didn't travel alone, I'd not have traveled. I've also flown around the country with DD since she was born (she's 31 now). These days my solo travel involves the 3 hour drive to my sister's home for a weekend or longer, or flying to Disney (super successful trip, 4 park days, in November). Wherever I'm going, someone at home (either DH or DD, or both) knows my itinerary, I check in from airports along the way when flying, and always contact them when I arrive at my destination or when I am leaving to go home. I don't have a smart phone, so I just take Disney as it comes, using guest services if I need to change or make an ADR. I do find that when I am on a road trip, I have to stop more frequently to get out of the car and stretch (especially since having my knee replaced), but that's about the only changes I've had to make when traveling solo. However, I do hope that when/if I slow down and it gets to the point that solo travel is no longer safe, I'll recognize this and stop traveling alone.