Long ago I was taught by somebody or another, that while landing on a sloping beach to put the uphill tire down first and then try to lower the tail-wheel so it hits around the same time as the down-hill tire. ( after making a couple one tire drags to make sure the gravel or sand is solid enough) And with a nose-wheel A/C it was still up-hill first, followed by down-hill and then the nose wheel once you could not hold her up any longer.
Well the other day I watched a guy just come down at an angle and he did a wheel landing type touchdown on both the uphill and down-hill mains simultaneously. He was using power and went further down the beach,,, but it seemed to work.
What is your preferred method? I figure I ain't too old to learn a new trick.