Sorry if the title wasn't clear. I recently took a trip and used my Lightroom on laptop to process and organize photos from my hotel. Now that I'm back home I'd like to move all of the photographs off of my laptop and onto my main PC for storage, but I don't want to lose any of my adjustments or tags. I already have a large library on my main PC and I'm not sure if it's possible to merge the catalogs in someway so that I don't lose any data. Thoughts?
If you created a new catalog for this trip,You can simply import it on your Pc(Lightroom>>File>>Import from another catalog)
Else you could Export all images as a Catalog from your Laptop and then import it on your Pc. See Import from Catalog « Julieanne Kost's Blog
For future refernece, always keep your Images(master files) and Lightroom catalog on an External drive, so that you can share the same catalog on both computers.Refer The Easiest Way to Share Lightroom Catalogs with Different Computers - Lightroom Killer Tips