Stapleford gets a bit muddy in winter, but if you can land a seneca downhill on wet muddy grass, you can hopefully land just about anything anywhere!!
Been there, got the soiled underwear!
Also fun are take offs and landings in the DA42 downhill on 04R using only the 600m of tarmac...I also remember take offs from O4L in the DA42 where full power with brakes on would leave the aircraft sliding sideways across the muddy grass.
SFC is a good FTO and I would recommend it to modular students.