Trails gives something that Pac and Ban cannot offer. It has the meadow holes and the woodland holes, all played on the same echoing, hollow ground as the other two courses. I don't doubt that C and C would have come close to what TD and DMK accomplished at Pac and Ban, but I question whether TD and DMK would have achieved what C and C did with the land they had. After walking up heart attack hill, the hike from the 13th green to the 14th tee, the caddie mentioned that three people had suffered coronary seizures during the first three months of opening (I played it in August of the year it opened.) I then proceeded to play 14 as it is supposed to be played, so I'll always call it a fair hole.
I'm getting a mixed message from your thread title and your question. Best course to play once? Definitely Cypress or Pine Valley or Royal Melbourne or...get my drift? Best experience the first time means something totally different. Trails never disappointed and never left me wondering what I should have done (whether I did it or not.)