Just because additional information never hurt anyone I'll go over the general layout of Fuyuki City. I'm sure anyone who's seen Fate/Zero (so like all of you) know that the city is split down the middle by a large river leading to the sea. The two sides of the city are connected by a Sydney Harbor Bridge esque bridge and each side is considered a different district. On the right hand side of the river (looking from the sea) is Miyama Town. This is dominated by residential addresses, and includes the Tohsaka mansion, the Emiya residence, and the Ryuudou temple (particularly important as a point at which many ley lines intersect).
The other side is Shinto. Shinto is very commercialized with large sky scrapers, shopping centers, and the "park" which is essentially a dead area where the fire at the end of the 4th holy grail war destroyed everything. Andrew will be based in Shinto as I assume the airport is located there, anyone planning on living in the Tohsaka mansion will obviously be in Miyama Town. It's probably a good idea to have some idea of where your character is located geographically, but being somewhat inexperienced with this sort of thing I'm not sure how necessary it actually is.
Edit: Oh my... the plot does thicken. What time is that occurring Huk? Also, was Berserker summoned at 2:00 AM on the 14th or 15th?