Glad to hear you're doing OK Art.I've been doing this dentist thing since the late seventies (never could play well enough to lose the day job) and if I weren't somewhat over 300 miles away I'd come over and do it for you tonight. It would be a small gesture compared to the enjoyment I got from listening to you and your contemporaries back in the day on Lincoln Ave.

Most drug stores stock little tubes of temporary cement, which is the best treatment choice. The denture adhesive ideas work ok tho the gel types can be a little thick and leave your tooth feeling too high afterwards. The powder type works better,but only if it's damp, and accidentally swallowing the crown, or worse aspirating it, is a significant concern. Don't do the expoxy or superglue route. Both make it dang near impossible to get the crown back off later, and if it's an older crown your dentist will likely want to know what's going on under it (i.e. did it come off due to decay?).

If it doesn't hurt, isn't an aesthetic issue and travel is difficult, then leaving it off till Monday would be my choice.
You know, if you gotta have a body part thats not working properly over a holiday, teeth are a much better choice than say lungs, heart, liver.