I've seen only one camera that records onto DVD format (Hitachi?). In that case, it recorded onto DVD RAM, which isn't as popular as DVD+/-R/W.
Honestly, what I'd do is buy a standard DV camera and one of those new Panasonic DVD Recorders with Time Shift. You can record directly from a Minidv camera with them, plus you get the ability to record other video sources (TV/VHS) to DVD as well.
You could easily spend ~$1200 on a setup like that, depending on the DV camera you buy. The basic panasonic recorder is ~$550-600. They've got one with a hard drive that retails for ~$1000 as well, but that wouldn't be required for recording from MiniDV