Have you processed the RAW images?
I don't know - I followed the steps on the Lightroom website/apple/random photographer blog that said nothing about processin. Simply importing them and opening them in LR and being ready to edit. I am new to using Lightroom too - I would usually use adobe bridge on desktop but as I only have the iPad I don't really know what I'm doing with these apps
OK. You're in a deep-end. RAW images are unprocessed, so they don't have any saturation/contrast/sharpening applied, which JPEGs do. Cameras automatically apply intelligent processing to JPEGs to make the images immediately useable. RAWs don't give you that, so you must process them after taking them.
If you don't know what you're doing, and your trip is imminent, I would either focus on doing some Lightroom courses (or YouTube videos), or start shooting RAW+JPEG so that you'll get reasonable JPEGs from the outset.