Some of these people/comments are the very reason why I often travel alone . . . including NOT taking my hubby. I love him dearly, but for some vacations I plan I know he would not enjoy himself or be game to go along.
Case in point, I just did a 5,500 mile (round trip) road trip vacation over 17 days driving from Milwaukee. My stops at points of interest included Hyde Park, NY (1 day), Bar Harbor, Maine (3 days), Fundy NP, New Brunswick (2 days), Cape d'Or, Nova Scotia (2 days), Halifax (2 days), Cape Breton, Nova Scotia (2 days) . . . plus the roughly 2 day drive out and 3 day drive home.
Sure plenty of my friends (and family) said "Gee Von that sounds like a great vacation you're planning to Canada . . . any interest in a travel companion?"
When I told them I was driving and planning a mix of camping, B&B's and small motels along the route, there were no takers. (But I knew that before they even responded!) Most people cannot fathom the driving part of such a trip. For me, it's as much a part of the vacation as the destinations. Being able to make impromptu stops along the route or calling an audible is part of "my fun" on a vacation . . . something many (most?) don't care much for.
Anyway . . . I think it's important to protect our own sanity at all costs. If/when we lucky out and find a compatible travel companion or the nature of the trip is conducive for others, I say by all means go for it. But at this stage in my life, I'm done trying to make my vacation plans fit others' . I guess I've become too selfish in many ways.