I play semi-regularly with a small/informal (work) jam band. Not only is my dulcimer impossible to hear over amplified instruments, but I feel their music resonating in my dulcimer more than my own strings.

I've seen those stick-on piezo pickups, but my question is would those even function in an environment where I'm feeling other instrument's in my own soundbox over my own strumming? And if not, what should I look for/ask a luthier to do for me?