That is quite a report. I confess to being surprised that someone who has lived his whole life in Maine, skiing since he was a kid, was that much of a virgin (his words) at tree skiing and powder at age 56. Home hill is Sugarloaf, which has enough of a reputation that it's high on my priority list if I ever ski the Northeast again.
But there are a few intersections between his ski career and mine. President's Weekend of 1991 four of us road tripped from SoCal for 4 days of skiing in Utah. George and Buffy Tang were powderhounds. Dave Fairhall had less ski experience than I did but his prior job was in Vancouver (skied Whistler with locals) and he has raw athletic talent. Friday and Saturday we skied Alta and Park City.
Then it started dumping. Sunday we went to Powder Mt., 13 inches new and snowing all day. But this opening part of the storm had 12% water content, and in those days before fat skis I was really burning my legs keeping up. Monday President's Day was at Snowbird with storm total 31 inches, typical Utah right side up 4% water second half of the storm. Between the expected holiday crowd and my exhaustion at Powder Mt., I thought it prudent to take a Mountain Experience clinic at Snowbird. The instruction was helpful in making powder skiing more efficient.
The timing of that Utah trip was fortuitous because
this is what happened a month later.
So like that TR I had a low competition day at Powder Mt. which gave me some powder mileage. However I had occasional powder successes before that, not like it was a 100% new experience.
Like that TR I then took a lesson to clean up my technique. He saw immediate results the next few days. I had to wait a month, but that Baldy day is still a lift served benchmark.
The final intersection is that he rented the DPS Wailer 112 and tore up the mountain on his final day. I bought the DPS Wailer 112 as my third and current powder ski in 2015.