between Mammoth Lakes and the June Loop and Convict, Rock Creek, etc there are upwards of 20 beautiful lakes you can drive to and they are within an hour of watch other. Stay in/near Mammoth and be in the middle of it.
From many of those sites if you're willing to walk an hour you can be in special places. Buy a map. Visit the Troutfitter.
The Troutfitter & Trout Fly
They rent float tubes if you don't have one.