but I'm not sure where I could go nearby to find out.
he funny but good thing is, that is almost impossible to do with Verizon Wireless. And even if Verizon isn't there another services CDMA might work for you.
So, Your job is to head deep into the mountains this weekend and give it a try.
Your mobile device can also use Assisted Global Positioning System (AGPS), which obtains information from the cellular network to improve GPS performance.
GPS AND LOCATION SERVICES1
aGPS (assisted), sGPS (simultaneous),
I beleve your saying you think the GPs works off cell towers it does not!