Looking for RV park in OK or TX for 6 weeks this winter

"Well isn't that pleasant"
But it's true. For warmer temps you need to be below I-10 or closer to it.

X2

I'll still take a Dallas winter over an Iowa winter. Dallas can't be any worse than Pennsylvania in the winter. :)

The reason for starting our research in Dallas area is that Dallas is within a one day drive of Iowa. I do appreciate the constructive responses that have been offered, and plan on visiting some of the recommended locations. Thanks to all.
Pigdoc

As others have stating in can still get cold even in southern Oklahoma. If you want to stay here though you might take a look at Lake Murray State Park near Ardmore, Ok. It's not too far on down to Dallas via I35. Ardmore is large enough to have most services you might want and some good restaurants. The park does have a 14 day stay limit but not sure how much they enforce it hurt the winter.

There is a couple of parks near Atlanta Texas located on lake Wright Pattman. I forgot the names but they were fairly large and nice sites set up for snowbirds

You can also check out campgrounds around Lake Texoma.

Just come down to the Rio Grande Valley, warmest winter weather in Texas and nearly 500 parks to choose from.