I don't know if the current schedule has any such runs right now, but over the years, there have been R5 runs that go from Doylestown all the way to Thorndale, with a return trip all the way back to Doylestown on the same set of cars after a layover. The total round trip is about 5 hours. I have always wanted to ride both ways, with no stopovers anywhere in between. Since food and drinks are allowed on the train, I could just bring something along to eat for lunch. Or I could eat during the layover at Thorndale.
But only recently, it occurred to me that this is an awfully long trip to take with no bathroom opportunity. I don't know what's out there at Thorndale; if there's enough time and a McDonald's or similar restaurant or a library within walking distance, I could probably hold everything in until then. At least I know a couple of places near the Doylestown station that I could drive to in a hurry to use the restroom. I've been to the main Bucks County public library many times over the years, and the restroom there is decent.
Ironically, most libraries have decent restrooms, but I'm not too thrilled with the one for my gender in the Free Library of Philadelphia main library on Logan Square. One time when I knew I'd have to use the restroom before getting back on the train at Suburban Station, I decided to try to find a public restroom elsewhere on the way to the train. I've long known that major hotels often have decent public restrooms off the lobby, for the use of visitors to conference and banquet facilities and restaurants. (This was also mentioned in Philadelphia Jennifer Weiner's first novel, "Good in Bed", although I already knew this by then.) I tried the two big hotels I passed, the Four Seasons and Embassy (round building). In the Four Seasons' 1st floor restroom, I saw a washroom attendant, probably expecting a monetary contribution, so I ducked out and headed to the other place. At the Embassy, the 1st floor restrooms are shared with the TGI Friday's restaurant, and they're kept locked, with patrons expected to get a key from the restaurant host/hostess. So I had to pass that one up, too, in case there was a "Restrooms for customers only" policy.
At Suburban Station, desperate, and with only four minutes remaining until one of my rare chances to take a Bombardier express home (not the trip I took last Wednesday, but it was also on a Wednesday the 25th), I located the restroom there, expecting somewhat of a dump, maybe even worse than the one at the library. But I was pleasantly surprised at how good a condition it was in, and I think I've even used it since.
Soon you will need to be in your 60s in order to remember the 60s.