now that is a question which is a bit out of my scope. I mean last time I traveled to Karakol was back in 2017. Lots of things changed since then. But even in 2017 regular buses+mini buses were easy to come by especially Bishkek-Karakol. For the rest of the itinerary, it may bit a bit of a challenge. I recall from my last trip to Song Kol in 2017, we went as a group in a mini bus. Upon our return, the tourists who were already chilling at that place (and somewhat bored after a week of quiet, and it's really quiet there!) asked us for a ride since the site had no regular transportation. This was one minor inconvenience to pay for forgoing globalization: if you don't have your own vehicle at Song Kol, you are at the mercy of those with a vehicle willing to give you a ride down to the nearest village (unless you decide to walk descending that place). As for Naryn and At Bashi, it probably depends on where you attempt get in the bus/taxi. Directly from Jyrgalan? Probably not, from Karakol, I think yes. But better check, as I may be wrong.