I don't see a problem with back to back par 5's - twice. In this course they will all play diferently, and if my fallible memory serves, three of the five par 5s run downhill for the majority of their run. (Disclaimer... I have not played the course.)
#4 runs down with a perched green up high. . .
#5 runs down with the green in the lowlands (also an alternative green behind an old delapidated corral with (swinging from the wind w/ rusty hinges?) gate above bunker. It's not the SafeCo Field (Seattle) train but it's iconic.
front nine
4,4,4,5,5,3,4,4,3
back
4,3,5,5,3,4,4,3,5 Thanks Michael (the savant) Dugger)
#12 runs uphill with dogleg but the approach area to the green levels out (but with a hidden Valley of Sin).
#13 runs, and I mean runs downhill. I think it was a long one for the back tees on the border with Mordor.
#18 brings us home along a hookers nightmare if winds are from the north but the large leftwardly canted dip in the middle will add suspense even for the well struck shot.
Even though this course will allow carts, I don't envision the walk being a slog. Though it has plenty of elevation changes, it's not life threatening.