Ratios: I've modified some of the ratios that Dorie calls for in her recipe but want to point out, as she does, that a lot depends on the size of your pumpkin. Mine was exactly three pounds, very petite, and held all of the mixture as prepared. I used a bit more cream than Dorie but felt justified because mine was light and hers was heavy.
Servings: Our pumpkin yielded two generous portions and a little left over for lunch (we easily could have eaten all of it but tried to control ourselves). I'm going to prepare this again when my inlaws come to visit this weekend, so I think I will need to cook two pumpkins for all four of us.