That would yield some valuable information. I'm guessing it would yield some increase in your heart rate while the hole is being drilled though. You'll need a plan to stop the leak if you strike a gusher.
Yes I will be prepared to stop the leak but am only planning on drilling a very very tiny hole so even if water does come out I can stop it with my pinky. More so it will tell me the seriousness of the problem and if I do need a haul now or can wait till end of season