Have fun at the jam! Banjo, mtn dulcimer and PW seem like a great trio of 'tools' to take for that scenario. (I play all three, as you may know already...tho my pw playing is not up to jamming much yet)
I can appreciate the meditative and calming quality of playing the NA flute. I can envision someone playing it at a window or in front of a fireplace on a grey winter day or snowy evening.
I had moved this thread to the "Adventures with Other Instruments" Forum category here, so you needn't worry at all about talking about other instruments you might play here. I myself like discussing various instruments that people play, and why they play them.
I'm finishing up a pre-tuned G kit from Stellar Flutes. With the pentatonic scale I really do like the improvisational aspect of playing. This really is a meditative instrument and you're not going to be jamming with it. I like playing it in the evenings. I can do so without worrying about missing a note. Just an odd, personal interest that I am enjoying.
BTW going to an OT jam this Sat evening and taking banjo, mtn dulcimer and will slip my D penny whistle in for good measure. Have a great week.
This is all I will be saying about the flutes on this site, did't want to get off topic with anything.
I've managed to so far resist the 'siren call' of Native American flutes. I love how they sound, but I suspect the NA flute scales probably don't lend themselves to the types of music I most want to play- early American and European folk tunes and fiddle tunes, and also medieval/Renaissance tunes. And I'm aware of my own tendency to spread myself too thin in my musical endeavors... I'm still new to pennywhistle and am a rank amateur- so much wishful music learning to do -and so little free time!