Going away with my 5 girls we have hand luggage and also 20kg holdall luggage. We are going for 10 days to alicuda (if spelt correctly) in july, so really will only be taking light clothes. What size suitcase will weight around 20kg with light clothes. I don't really want a huge one but don't want loads of little ones. Never bee aboard with them before so any advice on cases would be great thank you