Canada Day Fireworks - Digi Layout

Decided to digi-scrap some of my fireworks photos from Canada Day. This will go in the year-in-review book that I'm putting together. The top of the layout is a number of photos placed together to form the group.

For those of you with experience printing 2-page spreads....how do I get it ready to send to print (in 2 files). I am using Photoshop Elements 6.0. Will I lose any image quality if it gets cropped? Or should I use the resize canvas funtion. Any suggestions would be appreciated.

Credits: Patterned Paper and Title Element from "Canada Day" Digital Kit by Ruth Davis & Karen Aicken (www.e-scapeandscrap.net)