So, I'm nearing the conclusion of a novel, and I just realized that 70,000 words in, I've never told the readers where the characters live. Now, this is may seem like a rather trivial detail, and if after developing the story for so long and never mentioning it, it probably bears no consequence for the readers, because the story probably can take place anywhere, but that isn't the case. Right now, the characters are trying to locate a person from their hometown, while they're in Hawaii. But, this person is using an alias, so by way of description, I say this to show that the characters have no doubt that this is the person they are trying to find:
Ms. Lawrence finally gets a current location for a Craig Melbourne – apparently, Dr. Greg was working under an alias – who frequents a Family Psychiatry in __________, Pennsylvania – the practice Mrs. Mayes and the Parkersons confirmed they’d brought their kids to.
I want to put the name of a city there. I was going to put Lakewood Pennsylvania, but being this far into the novel, I don't want to have to go back and change any details that may not fit for a story taking place in Lakewood. If I've already established that the town the characters live in is three hours away from a camp in northern New York, would it be correct for me to make up a generic town name?