Also -
1) taxi at walking pace. There isn't much clearance between the prop and the ground, and as the ground will be rougher than tarmac the aircraft will be more liable to oscillations, so take it carefully.
2) Ensure you phone ahead to get the latest on the state of the runway.
3) Be prepared to clean the underside of the aircraft if it is at all muddy - so best pick a day when your chosen airfield is firm.