North towards London
The slip road from the Pease Pottage flyover down to the M23 can be used to hitch rides. It is a dual lane entry with a sharp bend so traffic is slowed.
Asking in the service station is also possible. Flying a sign at the services has also caught Brackers a few lifts even though its technically on the Southbound side.
South towards Brighton
Asking in the service station gets fast lifts to Brighton and the coast. Standing at the entrance of the petrol station and the exit of the services yields the best results and you capture all traffic.
Accommodation and Sleep
Pease Pottage service station is fairly large and it may be possible to find shelter in some of the woodland that surrounds the car park.
Other useful info