We use a full size annual book that has one full page per day. I think it's a 2002 model, would have been a busy secretary's daily book. We are about 50 pages from the end now.. and have been writing about every trip since 2002.
There is something really neat about having it written in pen and ink rather than a computer screen. It will last a long time, and is easy to read. Now we have tabs marking off each year. Over 90 days last year, not nearly so many this year because of other issues.