Comment by OuterVale
You can absolutely bunny hop (and so much more). With a 24″ or larger wheel, you can pretty confidently do short trips. If you're looking to do a few kms, 27.5″ is the sweet spot I've settled on for the size/speed/comfort trade-off.
Where I live you're even permitted to take them on the bus/train, assuming you're not being too much of a pain. Unicycles are specifically outlined in the terms.
This is exactly why I just bought one! I take the bus to work, but I live about 1.5k from the nearest bus stop and it's pretty flat.
Unfortunately it's just starting to be icy here so I probably won't be able to make much use of it for several months, but at least it's something to look forward to!