So, you walk in and find the gig's just you and a guy on vox and acoustic guitar. You're playing electric guitar through stomp boxes into a D/I box.
Acoustic guitars are very percussive, so he is doing rhythm, and this is very vocal-centric. It won't be like there's too much time to go on extended breaks.
First thing I did was keep above the fifth fret. Acoustic guitar guy was in first position, and there's no reason for two guitarists to play the same voicings.
I also played lots of sustained chords, maybe arpeggiating them when I thought there was room. Acoustic guitar is punchy, so he can handle the rhythm.
I sorta thought about Mark Spencer playing with Jay Farrar and decided that I couldn't be that busy. Except in one spot, and I didn't take that to the full extreme like I could.
So, when you're supporting a folksinger with an electric guitar, what do you do?