Course these should be considered BACKUPS as fallout, chemical or biological contamination could render them unusable for an extended period of time. Also something as simple as a diseased animal falling in the water could start up the food chain sort of speak.
The bigger consideration is that OTHERS will be accessing ground water points. In other words, having the only lake in the area could be a detriment to you more than a blessing. Think about it.
And for the "can't we all just get along" crowd- consider that if you open up your land and water source to every Joe Blow that comes down the pike, your opening it up to contamination, both intentional and unintentional. Also, then it's considered a "resource" and pretty soon it's "hey man water is EVERYBODY'S."
You have to remember that with today's TV watching, "de owe's me!" socialist crowd, YOUR stuff is THEIR stuff in their mind.
You might think that letting a couple of folks in to get water from your pond would be helpful, pretty soon you'll have a group of squatters living on your place.