I have been trying to learn the banjo for a couple years. An irregular practice schedule hinders progress, obviously. Unfortunately for me this is unavoidable as I travel frequently...I’m a pilot. I was wondering if anyone knows of a good way to practice banjo while travelling, such as a different type of banjo? Maybe similar to the neck with the amp plug in for the guitar?
The famous pianist, Glenn Gould, would 'practice' mentally imagining the performance in his head.
Of course examples from geniuses aren't very helpful for mere mortals, but that anecdote at least suggests there is a purely mental aspect that could be exercises.
Aside from looking for some kind of travel instrument, you could try mentally rehearsing.
For a large scale composition like a sonata a lot of memory and concentration is required to mentally recall every event for the entire work.
The banjo music you play may not involve the same intensive memory function as a classical sonata so this kind of exercise many not offer much value. But you could try it.
Also, short of banjo specific options, you could try using the travel time for general ear training. There are lots of apps you could try.