You may keep the Catalog on any of the drives, however if you have a backup of the Catalog and also if you have the images with you.
Then you may open the backup catalog and then reconnect the images in the backup catalog in Lightroom.
I assume I have to re import my photos into lightroom but how do I use my backup catalog?
Do not re-import! This will not work.
You need to open your backup catalog by double-clicking on it, then re-connect (not re-import) the images using these instructions: Adobe Lightroom - Find moved or missing files and folders
Thanks Tanju, I do have a recent backup catalog. Do I need to import my photos into lightroom first?
Do I need to import my photos into lightroom first?
No, please read my earlier reply.
OK dj_paige. I get it. Thanks for the help all!