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....
: Sour IPA
: Spanish FlyPA, Bourbon Chocolate RIS, Helles Lager, Best Bitter
: Blueberry Espresso Brown Porter, Blood Orange Wit, Imperial Session IPA
: The HBT Sweaty Fat Guys Cigar club