Tracy, I think you're right. My grandmother always used to say, "You can't put an old head on young shoulders," and its so true! You and I are also very alike in that we tend to feel that we are responsible for everyone having a good time. In the end, we can only be responsible for our own reactions to things, whether at home or in "the World."
(Don't we feel like venerable old and wise sages, now?)
I'm glad your experience hasn't soured you on bringing other friends in the future. And, as always, I'm so thrilled for you that your future always seems to involve another WDW trip!!

Eagerly waiting for the next report,
Kathy