I too at my advanced age did my first Munro last year, I took my two boys(early 20s) and we did exactly the same route as you, but we did it June the 1st and it was a hot day,we had to refill water bottles from streams as we were so hot.
The next day we did Bein Luibhean (Corbett) and Beinn Ime (our second Munro) from Butterbridge, and had another hot day with fantastic views, we were very lucky.
We went to Scotland again this year, my lads chose Skye (which worried me), but that's another story.