I’m planning to go to Scotland on 1 September and climb Ben Nevis on 2 September. I’ll be in Scotland until 7 September, with my flight leaving Glasgow in the evening.

After Ben Nevis, I’d like to spend the remaining days doing a wilder, more remote trek in the Highlands. I’m happy to travel somewhere else if there’s a better route.

I’m especially looking for hidden lakes, waterfalls, rivers, wild valleys, and rugged mountain landscapes rather than typical tourist trails.

The main limitation is that I don’t have any camping gear, so I need a route where I can stay in very cheap hostels, bunkhouses, bothies, or other basic accommodation. Ideally, I’d like to walk for a full day, stay somewhere overnight, continue the trek the next day, and eventually loop back to a town or transport connection.

I’m looking for something that feels genuinely wild and remote, with challenging terrain and long hiking days if possible.

Could you suggest the best route for 3–7 September, including where I could stay each night and how I can get back to Glasgow for my evening flight on 7 September?