Nice looking yard!
. . If it were me, NEW grapes are a four/ five year project therefore I would prune/ clean up existing plants and see what type of grapes they produce in 2021, if research shows there is a variety that is less than ten years old I might plant some otherwise I would assume today that the varieties are what is available for the climate, ,,,, varieties don’t quickly change
. . if you sample local wineries you can find what kind of wine you might produce, also look up the local wine club for your location, they will help you in what works and finished wines (possibly KC Cellar Masters), a club within an hour might know what your vineyard has produced
. . the neighbors probably have some idea what the grapes are and what the old owner made with them, and if you are real lucky a bottle from a year ago,
. . can’t help with favorite varieties for Kansas since I am zone five, FYI mid continent grapes take lots of spraying,
. . a raisin will be a seedless variety, for small scale production you could set up a horizontal screen with box fan(s) and thin bed as one inch, ,, air flow will be essential otherwise you will mold them before they dry
Good luck on the project and welcome to WineMakingTalk