If you have lots of luggage, consider a coach or taxi to Gatwick for easier boarding
https://stephenwxrn318.iamarrows.com/central-london-to-gatwick-airport-late-night-and-early-morning-travel
If you have lots of luggage, consider a coach or taxi to Gatwick for easier boarding. Trains can be crowded at peak times; board at the front or rear cars for more space.