G'day all

So, Rangella (84 RRC) has a very annoying squeak / squeal from the N/S front wheel bearing. I am told that it is the seal. Sometimes it is worse than others, but it is worrying me and I would like to fix it! I have not had a lot of experience with wheel bearings, but can usually get most things done myself. So, what are my options, can I just replace the seal?(is that possible?) Or, once that far into the thing should I replace the bearing? Maybe I don't need to replace anything but grease or lubricate? If I pull it out will I (should I) encounter oil or is it just grease inside? I'm on a bit of a learning curve here so any advice much appreciated.