I’m mainly a drummer, but I play some guitar as well. And I think I have 5 capos or something laying around. You can’t have enough 😉 As you say it’s really helpful for creating more interesting guitar parts and/or doubles.
Joe great tip i have used it and probably will again. one other tip for you is if you have more than one acoustic guitar in your collection use the nashville tuning on it and double your parts with it. you will be amazed at the sound.
since i have two acoustics i buy a set of 12 string guitar strings and put the octave strings on one for the nashville tuning and the rest on the other guitar.