I switch our gearing around depending on the type of riding. For regular day rides, we typically have a low gear of 28-32. When touring, we have 26-34. Even when touring with an extra 30 kg of luggage in the panniers, it's not too hard to keep the ship steady when doing above 5 mph (8 kph); if the speed drops to 6-7 kph (4 mph), which is pretty rate, then I do start to struggle, but we've never gone down (yet).