"Resort" w/in a couple hours of Flint MI

Maybe Traverse Bay RV resort would work for you

Traverse Bay RV

or Indigo Bluffs by Sleeping Bear Dunes

Indigo Bluffs

Panco's Pond. Good choice. Spent a week there in 2013 and enjoyed the hell out of it. A couple of pools, hot tubs and extremely clean.

We like to stay here http://duckcreekrvresort.com. Sites are huge and we love that area of MI.

I have stayed at both of these parks and would go back again.
Very nice, clean and have plenty of activities not to mention the lake itself. From Sandusky you can go out to the islands.

Harbortown in Monroe Michigan

Cedar Point, Sandusky Ohio

We really like this one and it fits your requirements;Baldwin Michigan

Thanks for the suggestions. 2 gypsies Ponchos Pond looks exactly like what we are looking for. It tops our list for now.
We are just wondering if there is anything in surrounding states.

This is where we go: Silver Creek RV Resort

Maybe just a coincedence but there's "East Pointe RV Resort" in Grand Haven, MI on the east side that's new (opened late august 2015 so limited pics so far but enough to see) and very deluxe and meets all your wants including golf cart use. Bet you'll have no problem spelling the resort name right! It's right on the wide Grand River and very upscale and special but not cheap therefore. 70' new concrete paved pad with a long wide concrete patios on all sites, a huge pool and hot tub plus lots of other stuff/activities and new bathouse and a resort meeting/RV'er use too. Totally full hookup 50 amp, water, sewer, cable, WIFI included, plus new picnic tables and firepits. Gorgeous landscaping and kept spotless and has roughly 70 of it's over 150 sites right on the river's edge long 1/4 mile+ riverfront with fishing galore if desired. Putting in approx 35 docks next spring so you can bring your boat or rent one in the area.

So much to do right in the area and excellent shopping, museums, live performances downtown almost nightly plus about 90 restaurants right near by or local. Some of them you can walk to from the resort, only a block or 2 away. Very clean and safe crime free all over the area. Public transportation right from the resort if you don't want to drive yourself. 3 state parks in the local area with one having approx 1200 acres full of trails beaches all over the area (2-1/2 miles of state park pure sane beach on Lake Michigan, and has a meseum/interpetive building too. A .7 mile long boardwalk from the 1/4 mile long public pier in Lake Michigan to downtown, goes past/thru marina's too plus lots of other stuff and nice kept parks and then continues all the way to Spring Lake. Has food and restrooms and shopping and outside cafe restaurants plus lots of nice benches with seat backs nearly all the way. Everthing in the local area is handicapped accessible and there's lots of kept clean public restrooms thruout.

Google; East Pointe RV Resort

There's the web site as far as they have completed the page so far but it has pics and any info you may need. You can stay one night or a full season which means you can leave your RV right there on the site like having a vacation home just waiting for you when can or you want to be there.

Walking cures stress! :)

Here's one over at Ludington:

Poncho Pond RV

No kids just two mid 50s stressed out adults.