I noticed significant differences between Nep species during winter when the indoor air stays pretty dry. N veitchii, in particular, seems especially immune to low humidity, but my N maxima does pretty well. My Sarrs and VFTs stay outside and, in CT, only really know high humidity. Where & how do you plan to grow CPs? Knowing that might help people answer the question.
By the way, humidity is a poor measure of the degree of evapotranspirative stress a plant faces. Coastal Alabama is considered a pretty humid place, but when the temperature hits the upper 90s on a breezy & sunny summer day, a Sarracenia is facing drying forces that are nearly as severe as if it were in Utah. But the AL plant will spend hours in 100% humidity the following morning and can recover for another day. Most plants do much of their photosynthesizing during the morning and shut down by mid-afternoon because of water stress, no matter where they are.