Hi Jim. The answer is "Yes".
Here's more. Your Library is a database. The core record in the database is the Image. Attached to the Image are all the info-pieces Aperture knows about the Image. One of the pieces of Information is where that Image's Master is located. (If it is located inside the Library, the Image has a Managed Master; if it is located outside the Library, that Image has a Referenced Master.) The Library is a stand-alone unit -- you can put it on any up-to-snuff Mac that has Aperture (the program) installed, and open it and use it. If, when open, Aperture can access your Masters, then they are "on-line" and you have access to all of Aperture's features. If Aperture cannot access a Master, then that Image's Master is "off-line" and you cannot make adjustments to, or export full versions of, or print (a form of export) that Image. Even if the Master is off-line, you can work with all Image metedata: ratings, keywords, Albums, etc.
So: copy your Library to your laptop. You now have another backup. Take your laptop on vacation. Add to your Library (probably using Managed Masters), do whatever keywording and other metadata administration you want on any of your Images. Return home. As a precaution, make a backup of your changed-on-vacation Library. Then delete the Library on your desktop (this copy is now out-of-date), empty your system trash, and copy your up-to-date Library from your laptop to your desktop. STOP USING the laptop version. Use the desktop version.
While on vacation, your not-added-while-on-vacation Masters will be off-line. Once you copy your laptop Library back to your desktop and open it, it should find and reconnect to all your old Masters -- it will make them "on-line".
You can filter for Images with Managed Masters (the ones you imported while vacationing), and use "File→Relocate Masters" to convert them from Managed to Referenced and join them with your pre-vacation Masters.
It is possible to take only a subset of your Library with you. That is a little more complicated. In that case, you will want to select the Images you want to have available on vacation, and export them as a Library. Take that Library with you, work with those Images (with the same limitations vis-a-vis whether they have Managed or Referenced Masters), and then merge that Library into your desktop Library.
Have a good trip. 🙂
Message was edited by: Kirby Krieger