Being in a Country where MJ is illegal to grow, surprisingly, my GROW shop is always a great pleasure to make a trip to. The staff is always helpful, and never asks too many questions, just enough to figure out what I'm looking for, or trying to do. I realize that MJ is probably what keeps their businesses alive, as I know 10 times as many people growing MJ as I do legal plants or food. Also why be biased? Why call it a hydro store like most do? It's a grow store, they sell soil too.
Make the trip and unless your some huge operation, don't worry about using your credit card. They don't give a fuck. I always pay cash, why pay interest on your grow supplies??