I've done several vacations in the same book. My first trip in my vacation book was a Niagara trip and I did a title page, which is very plain and was my first page ever. That book got too big and I just started my 2nd vacation book with my last trip. On the first page I did an 5x7 of us from Hoop De Doo and a welcome journal.
For each subsequent trip in the first book, I have a 2 page layout for the start page and I do put a main pic and some souvenirs and journal the basic info for the trip.
On my non-vacation books, I have yearly books. My son's birthday is in January so on those books I start with his "birthday photo", which is usually larger and then I lead into his birthday party.
So yes, in each book I have a title page of sorts.