In reply to BattyMilk:
> I have a question about sleeping bags. I currently have a very cheap bag so am looking to pick up a new one for this and future trips. I'm looking at the Synthetic Mountain Equipment Starlight 3 ("good night's sleep down to around -10") or 4 ("good night's sleep down to around -15"). I'm not carrying much fat and can be susceptible to cold. Would either of these bags suffice - they are around the price range I'm looking at and on spec seem fine. If not, could anyone recommend an alternative?
It's really hard to say. Best advice I can give is to borrow a bag and see how you get on. Take an insulated jacket with you and you can always use it to pad out the insulation if necessary.
> Is it safe to drink from streams? What precautions should we take with sterilizing water?
Unless there's a dead sheep in it, I'd say yes. I've never used any kind of sterilizing treatment when drinking from streams in the UK.
> Any other tips would be greatly received.
Just the usual - leave no trace. I wild camped in Glen Etive over New Year and it's sad how difficult many parties seem to find this very simple rule.