Perry, KS is near some great places to explore in an RV, and there are plenty of RV maintenance resources throughout Kansas. You can find free non-potable water at Perry's dump station, and it's located at a scenic park. Topeka isn't far away, and has plenty of options for Kansas dump stations also.
There are a few storage businesses in Kansas that let you use their dump stations at no cost too. If you see an RV storage place, then you can probably dump your wastewater there as well.
Kansas RV Parks: Top 10 Campgrounds in Kansas Top 10 Campgrounds & RV Parks in Lawrence, Kansas Top 10 Campgrounds & RV Parks in College Station, Texas Top 10 Campgrounds & RV Parks in Enterprise, Alabama Conroe RV Parks Top 10 Campgrounds in Conroe, TX Abilene RV Parks Top 10 Campgrounds in Abilene, TX Dallas RV Parks Top 10 Campgrounds in Dallas, TX Top 10 Campgrounds & RV Parks in Denton, Texas Texas RV Parks: Top 10 Campgrounds in Texas Kentucky RV Parks: Top 10 Campgrounds in Kentucky