Hi, we are travelling from Manchester this time, which is a pity as they don't do the twilight check-in, but it is closer. We have travelled from Gatwick twice before, get to hotel and get ourselves organised, then go and check in the bags at Gatwick. It makes for a much more relaxed start to your holiday.
You do need to be organised however, as there is a restriction on what you can take as carry-on in terms of volume and liquids we tend to duplicate toiletries. We pack a bag for the overnight stay and then just throw all that in the boot of the car at the airport and make sure all the toiletries and as much of the other clutter we need was packed and checked in the day before. This way, you only have to go through security with your hand luggage and it really is easy.
All this said, I still get to the airport way too early because for me, the holiday starts when I get there and I like to do some relaxed browsing round the duty free and have a nice breakfast. I don't do the twilight check in to reduce the time of arrival particularly, I still get there at least a couple of hours before the flight, but for the peace of mind. We are talking here of someone who has nightmares about missing flights, not being packed on time etc....
If Gatwick were closer (at least 4 and a half hours from Cannock) we would go there and do the twilight check in every time!!
Have a great time.