Winterization: wet or dry?

It is way early in the season (even up here in the NorthEast), but I'm trying to head off a disaster later on...

We (DW and myself) are planning on taking a late November trip down south (Florida? Georgia?). It'll be after the seasonal campground we're staying at completed their "winterization services" for those who choose to participate. Which means that when we come home, I'm going to have to get ready for The Big Freeze which comes later in the season.

I've read that there are two ways to prep for winter. First is to replace water with anti-freeze. Call this the "wet" method. You get a gizmo to allow the water pump to suck anti-freeze from the jugs, etc etc etc... There's also a gizmo out there to connect "city water" to an air compressor. So basically, one by one, you open each water faucet and blow the water out under air pressure. And no need to dump in anti-freeze with this method (from what I have read).

So, what's the collective wisdom? Get the gizmo for wet prep, or get the gizmo for the dry prep?

Thanks in advance for the guidance!

j