I see there is a passenger only ferry. Is there either a car ferry or a place to return a rental car in Balestrand? I’m guessing it’s too small of a town for a rental car return? We’re driving from Trondheim to Bergen over 3 days and would love to take a boat ride down Sognefjord.
No car ferry Balestrand - Bergen. Just use the car ferry Dragsvik - Vangsnes to cross mighty Sognefjord at a scenic place. The major western fjords in general get less spectacular when coming closer to the coast.
The car rental company in Balestrand is independent. https://leigebil.no
You should consider the car ferry Kaupanger-Gudvangen. https://www.visitflam.com/activities/fjord-cruise-sognefjord/
If you want to return your car in Sogn, then I guess Avis Leikanger is your best bet. The boat Balestrand-Bergen stops in Leikanger before Balestrand.