This is great, thanks! Have read through briefly and will bookmark the thread for future reference.

Thanks everyone for the comments.
[MENTION=199530]djb[/MENTION] - I've done a fair bit of camping, but not on a bike, so this is the first time I've really had to think about weight/size vs function. The first time I realised that not all sleeping bags are made the same was when trying to sleep in a Nepalese tea hut in the Himalayas at 3,000m. In December. Ugh!

[MENTION=392454]CliffordK[/MENTION] - Yes, following the weather South with a tail wind behind us was the plan.