JHW - one very useful thing to take with you if you can't sleep in a noisy environment - campsite, bedroom next to road, seagulls, etc. - is a pair of mouldable earplugs. You can get them from Boots and other chemists - roll each plug between the palms to make them soft and then push them into the ears so that they fit all crevices. They might seem a little uncomfortable at first but you get used to them - and they're very effective.

A must for the traveller.