Today, at 1pm (four days later) I can say that my recovery has continued to go smoothly. While not fully acclimated to EST, I am back to training.
Yesterday I spent the morning riding lifts at Whiteface, and then did 40 minutes on the exercise bike. This morning I did a vigorous 45 minute PT strength session, followed by a short 20 minute hike with Stash. This afternoon I'll do a short ski at Mount Van Hoevenberg and another stint on the exercise bike.
So, while it's clear from this picture I am deep in the pain cave - topping out on the course high point - at the 35k mark, I am pleased with my training and race preparation. And while I was a DNF, I feel excited to know from Strava that was my longest ski in over a decade. Also, I did hit three lesser goal: average ski time of 8:30 per kilometer (I managed 8:27), ski baby prince Hakon (11 pound pack) across the two mountain tops, and not wreck the day with poor decision-making, like skiing the hard, fast, crowded, technical final downhills.
Further thoughts: bring skin skis as well as a pair to wax for kick, build confidence with more practice time on those last hills, and consider the "tour Birken" to avoid congestion.