Have you matched the project properties to the source footage? If you have, then resample will make zero difference. If you haven't then your footage may look funky, with or without resample enabled.
I don't think resample is the issue.
Also, are you seeing this when you pause the playback, or are you seeing this as you view the video at full speed? 30p is a fairly slow frame rate, and you will definitely see judder as someone waves their hand back and forth. That jerky motion is due to the low frame rate. That may not be what you are seeing, but I thought I'd mention it.
So, match the project properties to the source footage (there is a button in the project properties dialog that will do this for just by clicking on it, and then pointing to one of the video files from your shoot).
Resampling is in Vegas. Right-click on an event, and select Properties. Default is "Smart Resample." Leave it there, unless you are changing your video frame rate from the source. Also, to repeat: match the project properties to your source media. Did you do that??