Also do they use the same runway for GA traffic as the 737s that use that airport now?
I did that kind of discovery flight in July as well. Awesome.
To answer you question, I can tell you that in my local airport, we have two runways as well, a 6000Ft 'hard' one that the 737s use, and a shorter 'grass' one that only the GA use.
Usually, as there is not a lot of traffic, GA uses the 6000Ft one, but on that day, there were a lot of flights, so both runway were used (simultaneously, as they are parallels). Anyway, most of the 'sightseeing' flights used the grass runway, but the 'discovery' flights had the privilege of the large one. Hey hey.
Have fun, and afterwards, start saving money, because you'll be wanting to do the real thing. That's what it did for me !