I found this discussion interesting because most years, my problem is keeping the vines alive until the pumpkins mature -- and I start worrying around late summer when frost is still maybe 6 weeks away.
-- most years, squash vines get hit hard by pests like SVB's, cucumber beetles, squash bugs and stink bugs. And powdery mildew starts up by mid summer too due to high humidity as well as, no doubt, the bugs infecting them.
Then I looked at where you are all from and you are all farther north/colder areas and/or drier too. Hmmm.
110-120+ day cucurbits do present similar problems for me as well though. Last time I tried, luffa finally started to flower (males only, not even females yet) when frost killed the lot. But I'm going to try growing luffa again next year.