Sheryl_Jim,
Welcome to KC! I read your post with interest, and I must say I agree with most of what "kcmo" has advised. I have lived most of my (much too long) life (don't ask

) in KC, both south of the river and in the northland. I am in the northland now and would never live south of the river again. The North Kansas City School District is terrific, as is the Park Hill School District. I believe there is a thread somewhere that argues which is best, but I'm not sure now where that is. They are both excellent nonetheless, as is Liberty.
For the best commute to Fairfax, I suggest the North Kansas City School District. It is quite racially diverse. I spent five years as a "YouthFriend" volunteer in the NKC District. YouthFriends go to the schools as many hours a week as they wish spending time with students chosen by the school counselor as students who would benefit from extra attention. A YouthFriend can be a lunch buddy, a tutor, or just someone to hang out with for an hour or so a week. I was a reading tutor, and saw five elementary kids--separately, not all at one time. I know first-hand that the NKC school district is excellent and is racially diverse, as is Clay County in general.
Look at the City of North Kansas City. Very small, has its own little government. Also has a very low crime rate. North Kansas City (not to be confused with Kansas City North) has more police officers per capita than any other community in the state of MO, and they also are the highest paid. This is partly because of the revenue the city receives from Harrah's Casino, which has greatly contributed not only to the "beautification" of NKC, but also to a new community center, a new library, and more recently, a new police station.
Either the North Kansas City or the Park Hill School Districts would be good districts for substitute teaching. As for nursing schools, I'm not sure. I don't know of any north of the river, but I do know that St. Luke's on the Country Club Plaza (south of the river) is known to have one of the best nursing schools in the Midwest, and would not be a drastically long commute from the Northland.
I don't know a thing about RV parks, so I Googled RV parks Clay County MO and found Clay County Parks and Recs website. Smithville Lake has one and there is a PDF list of fees. I imagine if you search more on Google for either Clay County or Platte County, you might find a few more. I know there is one in Weston, MO (Platte County, not too far) but I didn't check out the fees.
I don't have the answers to all your questions, I'm afraid, but I do have an idea how you can find out more about the student/teacher ratio and special ed programs in the NKC schools. Do a Google search for "YouthFriends North Kansas City MO" and phone them. Talk with the director. It's been a few years and I have CRS, so I don't recall her name (maybe Pam, or Pat? Not sure.) She is extremely helpful with this kind of information and would be more than happy to assist you in any way possible.
I'm sure there are more people on C-D who will be able to fill in some of the gaps and who also have their own opinions, as what I've written are simply my own, and I am by no means an expert on schools except what I've heard from living here and what I learned as a volunteer.
Best of luck to you!
