I am not sure how far you are willing to drive, but there is a shop in Rockville called Submerged and the owner, Tanya, is one of the nicest and coolest people I have ever met in this industry. To make a long story short, when I was looking to buy all my own gear, she let me try out a Hydros Pro and BP/W at a pool session for free since she sells SP stuff. In the end, I ended up buying a full BP/W setup and regs but not through her, and just piecing it out myself online and stuff, saving probably $1k had I bought all SP stuff from her. The pool session with her gear is the reason I ended up with a BP/W.
And after all that, I went back to her and let her know that I got stuff outside simply for $$$ purposes, and that I'd pay her for the pool session (its usually $30 to get in the water, let alone using her gear) and she was super happy I had gotten my own gear that I wanted and told me not to worry about it. And at that time, I used her to shop to get hydros done on my tank, and then took it to a pool session with her right in Rockville.
So my point is, she doesn't care about where you get your gear and you can go in the pool with your own stuff. She is super friendly and cool too. There wasn't too much space in the pool the second time I went because of other people using it, but it's good enough to test out stuff.
Here is the website if you are interested:
Submerged
Fallston says it's 60 miles from me, so without traffic and all highways, it's probably an hour or more maybe. That is about how far I drove to a pool session down in Woodbridge, VA at one time in the summer to try out gear, and it's really not that long in the car to try out new gear.
Good luck!