If you want to kill a couple of hours on a hot day you could also take the Kootney ferry from Balfour across the main lake for some ice cream / lunch browse small local shops etc and then take the ferry back. There is no cost for the ferry, Balfour is about 8-10 minutes from where you are I believe.
Also the Eagle View restaurant in Balfour has good food and a great view. A little $$ but not too bad.
Also in Kaslo there is an old paddle wheel boat ( The SS Moyia ) that used to steam up and down the Kootneys many years ago that has been restored for visitors to see. It's a small attraction but if you're in the area it's worth a look.
hth
Enjoy your trip.
