Hop on and off bus Kotor

[Luv2cruz1000]

We are hoping to get to Perast. Any opinions on using the hop on and off bus in Kotor to do so. I noticed it also stops in a few other places, are they worth stopping to see as well. We would like to have some time to see Kotor. There are boat tours from Kotor but I have not found a group tour that gives longer than a half hour in Pervast. We would likely prefer a boat but would not like to be rushed in Pervast. Thanks

Edited May 16, 2019 by Luv2cruz1000
Addition to question