Worstead is on the Bittern Line which run between Sheringham and Norwich.
You can grab a timetable here
Worstead is just between the A149 (Cromer to Great Yarmouth) and the B1150 (Norwich to North Walsham).
Follow the signs to Worstead, Once you're in the village follow the signs to the Car Park. Sat Nav: NR28 9SD.
Worstead is just half an hour from Norwich Airport. Check here for details of where you can fly from.
Or if you've got your own plane, you can fly in to Northrepps International.