On my recent 5K km tour of the Canadian Maritimes I had 80 ltr of luggage capacity, but only about 80% full. Included camping gear (2 sleeping bags, 2 thermarests...) I carry 4 pairs of riding gloves: regular, hot weather, cold weather, rain.
I'm looking forward to using my Mosko Moto ADV style Reckless 80 soft bags. They are 80 ltr bags, but can go up to 100 or down to 40. And they're 100 % waterproof.
But I don't carry a motorcyle cover. A small cloth to wipe off overnight rain works fine for me.