Hi Priscilla. I am taking a Best of Spain tour this fall. I will carefully cut the book into pieces so that I carry only part of it in my purse for daily travel. I may bring the whole book, in parts, as I have a few days after the tour that are not completely planned yet. I too go carry on only but will check my bag to return home.
One year, I cut off the cover and replaced it with colorful scrapbook paper and used wide clear packing take to make it more sturdy. I could sit at a cafe and look in my guidebook withhout everyone knowing Imhad the Blue book out! For some of the other cut out bits, a piece of wallpaper from one of those sample books was the cover. I did use a lot of the packing tape to keep the portions together. That worked for me.
Most of the time I do bring my book parts back home. Other times, I leave it with the front desk.
On another RS tour, I did see one couple use only a few pages torn out and stapled together, for each day.
The Spain book is quite large and I do like to have information with me in paper form daily. I do have my cellphone in my bag only to be used in emergency for a phone call or on one occasion I used the compass as my travelling companions and I had a poor quality map from the hotel and little direction on how to return to the hotel.
Have a great trip.