That looks good to me. Basic recipe, low hops, I like it. I haven't made my pumpkin beer yet but I've read it can be a bitch to sparge if you mash the pumpkin which it looks like we are both planning. I'd think about using some rice hulls or else getting a muslin bag or something to put the pumpkin in during the mash.
What are you using for spices?
I hate Walder Frey...