Dunkeld Estates, you can do a tour of the loch ordie, lochan oisinneach mor, etc, you can park up in the car park next to loch of lowes, then cycle up through the lochs, there’s a bothy (Sarah’s?) between Loch Ordie and Lochan Oisinneach mor, which can provide a nice little bivvy location, with shelter if required and it had a stove and so on, think it also has an outside well from memory, but not been up there for over a decade.
This was my old local route, lovely scenery, there are some hard climbs as you’d expect, but you can take alternate paths around the peaks to get between the lochs, Dunkeld is a couple of miles away at any time, with lot of provisions and so on.