FWIW, a friend of mine that's been brewing about 20 years told me to add the pumpkin to the mash last after mashing in the grains. Seemed to work well for me. Make sure to grab a pound of rice hulls too.
EAC - 5/2/14
Growing Hops in Key West, FL....
: Guava Cream Ale
: Berliner Weisse, Passionfruit FL Weisse
: Lemon Wafer Berliner, Cinnamon Raisin Bread Ale, Pink Lemon Wit
: The HBT Sweaty Fat Guys Cigar club