Definitely non PC these days, my fav is Up the Khyber I love the line "What rank stupidity" and the dinner party near the end is brilliant.
I also once caddied for Cardew Robinson who played the fahkir.
Not sure it'll work especially given the last outing, Carry on Columbus which was dreadful and I don't know whether in this day and age of political correctness it will work on any level. If they can't re-create the innuendo etc then the project is flawed from the start
My fave is Carry On Behind - the archaological dig one with Kenneth Williams and the attractive Russian colleague for endless double entendre, centered around some caravan park shenanigans with Sid James - very funny.