Probably no need to hand pollinate these if you are remote enough from neighbors . These are in the C. Maxima group . C. Pepo is what most people grow . Check out Sandhill Preservation or Baker Creek and of course Seed Savers Exchange . Maxmia includes the giant pumpkins , Hubbard and others . Will not cross with C Pepo types like ornamental gourds , acorn , zuke , spaghetti , jack-o-lantern .
I would have to bag them for sure. I love raising hubbards. My wife likes the taste. I like the challenge of getting them as big as I can.
Same as the mammoth pumpkins. We call the cow pumpkins. No one eats them but I like growing them. The chickens like them. I also try to get one to the grandkids at Halloween so they have the biggest jack-o-latern around. BUT the deer raise havoc with them, so few make it through.
I do the acorn and buttercup also, Judy eats them. I refuse to eat a squash. I am have more sophisticated taste buds .
The weird thing is I like sweet potatoes, which is a lot like a squash taste and texture wise.