I`ve chosen a car in rental24h with navigation and of course insurance. Because you can set on the map where you need to get and in any moment you can also control your location.
I agree that if you visit foreign country by rented car, you don`t know driver habits.
But for what I had traveled to Thailand? To acquaint with their nature, mentality, habits. The best way to see that all – is to rent a car http://rental24h.com/ and drive wherever and stop whenever you want.
There are all sorts of schemes to collect rain water falling off of roofs, from traditional gutters to ground collection below gravel. Try searching rain water collection.