I stopped over at Pitlochry for a couple days on the way from Dornoch down to Glasgow. Stayed at a B&B in the village of Moulin (adjacent to the course) and played three rounds. The initial climb on the first few holes is tiring but the up-and-downness of the remainder of the course is entirely manageable, especially given the short total distance of the walk.
The second day I was there, first thing after breakfast I took a walk up to the top of that big hill adjacent to the golf course (can't remember the name). Then played a late-morning round, had a late lunch in the clubhouse and another 18 late in the day. It was an exhausting but thoroughly relaxing day. Pitlochry is, for me, definitely one of those courses that pass the test of making you want to head straight from the 18th green to the 1st tee and do it all again!