Hi GN:
The only way to be sure if it's the water pum is to get under the vehicle with a light, wipe the pump and plastic hose dry, and wait to see where the drip is coming from.
It may be a dirty job, so be prepaired. Once you find the leak, purchase a repair manual (Chilton is a good one) and look up the problem and follow the directions.
If you have any problems or questions, let me know and I'll do my best to walk you through it.
I look forward to helping you.
Joe