Scandal.
It’s not too difficult. The best guide I have seen is the MBR workshop guide on Youtube (Rockshox lower leg service). Yours is an air fork, so I think all you have to do that I don’t is remember to depressurise the whole thing before starting.
Don’t take it to bits unless you’ve got the fork oil already as a minimum – taking the lowers off loses all the oil in them.
Google the rockshox oil chart for year of your fork.
If you want to do anything to the dampers or springs (tops of legs) you will need a 24mm socket – not all that common in standard socket sets.
You will probably need for lower legs alone:
5mm allen key
15wt oil
Isopropyl alcohol (for cleaning – can get from Maplin)
Rubber Mallet
Tyre lever (if you are taking the seals out)
New seals and foam rings (if you are replacing them)
Fork grease (for the inside of the seals – DON’T use normal grease as it shrinks the rubber)
Lots of rags
Something to shove the rag down the lowers
Bottle brush
Don’t wear decent clothes – fork oil is EVIL.
Follow the MBR guide and you should be fine – don’t leave it until the last minute before your Lakes trip, though – if you find the foam rings have disintegrated then you will need new ones – everything else can just be re-used even if it is knackered.
Not difficult and you cannot really go wrong – the tolerances are quite fine, so if something is wrong, it just won’t go back together!