Thanks to Ed and Cyn. I haven't yet decided whether to take the train or drive. I may just flip a coin. Pitlochry looks like a good place to stay, although it seems the Pitlochry Festival Theater will be dark during our stay. Because we need to visit Menzies Castle, which is nearby, I think a car will be best, with more flexibility. There is a good train connection, but I think getting to Menzies would be a bus ride. I wish there was a car rental in Pitlochry, but I haven't found one.
My sister-in-law was in the area last fall, driving. They nearly had a disaster with an oncoming tour bus. They ended up destroying a tire in a scrape with a wall. My problem is that I need to concentrate so completely on driving that I can do no sightseeing at all. My wife is an excellent navigator, and driver, but she is very reluctant to drive in the UK again. In 2010 we drove from London, to North Wales, then over to Whitby. We turned the car in a day early in York, after going the wrong way on a one-way street.
Anyway, thanks for the comments. I need to look at the maps, AGAIN. Argh.