Making a pumpkin pie... which pumpkin should I use?

OK. So I slightly lied. I am making a pumpkin pie, but these aren't my pumpkins and so won't be used in my pie. The shot was taken at Wisley during the Tastes of Autumn festival but I didn't get round to processing them before Hallowe'en. So they're now being re-purposed to celebrate Thanksgiving in the US. (Really hoping that the association between pumpkin pie and Thanksgiving is real and not some cliche that I've latched on to.)

[After running a cubs session about Thanksgiving on Tuesday, I'm full of wikipedia facts about the celebration, but I'll leave you to wikipedia it yourself, if you're interested.]

Anyway: we have an affinity with America for some reason, so this year, I'm preparing a scaled back Thanksgiving dinner, hence making the pumpkin pie. Mine will be made with (slightly out of date) tinned pumpkin puree and ready made pastry. #streamlinedpiemaking

Ironically, my christmas cake is currently cooking today, too. All sorts of festive cuisine going on. No idea what's got into me.

For anyone celebrating Thanksgiving, Happy Thanksgiving to you :-)