Not got a POH handy, but it is more than feasible.
1. 600m grass is plenty to land in, especially at the weights you are talking about.
2. Fixed tricycle gear and fixed prop.
3. From memory, at OAT 70kt final approach speed, reducing to 63kt at threshold. Short field landings I think were around 5 kt lower. Clean stall around 50kt I think.
4. Don't see why dumping flap would be an issue (I do it presently in the C150).
5. Flaps will be 3 position manually operated, with a lever just like a handbrake on the floor between front footwells. Awful design feature.
6. Engine capable of carb icing, but not overly prone to it. Build up tends to be slow and fairly predictable, with a drop of 100 RPM or so by the time it is noticeable.
Easy, if very dull and unexciting, aircraft to fly.