I have 300 hrs in Cherokee sixes and 450hrs in a n/a Saratoga. I would be very happy with a well drained 400m grass strip in the C6, if I wasn't heavily loaded, and the wind was 10kts down the runway. The Saratoga is quite different and whilst I am happy with grass strips, would be very wary of anything less than 600m - and would want to know that conditions were favourable before taking it on. The Hershey-bar wing and the later laminar-flow wings are very different animals...