Using canned pumpkin in the boil is going to give you trub, no real way around it. I have a wine bucket for batches like this to hold the extra trub. You could reduce the amount of pumpkin because the real flavor comes from the spices.
Bill from Pa
On Deck: Irish Stout,
Primary: Pumpkin Ale
Completed: Red, Wit and Blue, Irish Stout, Red Ale, German Style Amber Lager, All Grain Brews: Irish Red Ale, American Stout, Honey Weizen