Yes!! Very easy - and you can choose your seats at the same time. Alternatively, you can use the "Twilight" check-in which means you can check in the day before your flight from 12.00pm until 9.00pm. You must have all members of your party with you and ALL your luggage (including hand luggage). They take your main luggage from you, leaving you with your hand luggage and issue your boarding cards. You can then bypass everything the next morning, arriving at the airport later than usual and you can just go straight through to airside. We live just 40 minutes from Gatwick and have used this a lot as it means we don't have to get to the airport in the morning at some ungodly hour! There are plenty of hotels (including Travelodge) around Gatwick so it would be reasonably cheap to stay. Some of the hotels also offer 14 day free parking, so you can use this as well as the early check-in. It also means that you can leave any dirty washing or larger bottles of lotion in your car from the night before, thus just travelling with your 100ml bottles. Hope that helps - Alison.
Thanks for the information Alison. Very useful!