Thanks Ben. It was for a festival. It will be run from a computer through a projector onto screen. Festival rules said product has to be a file (no burned DVD) and the submitted file had to be in 30 (29.97) self contained QuickTime file (there would be no DVD machine playback involved).
I tested converting 24 to 30 in Media Encoder and also editing the original 24 footage in a timeline sequence set at 24 but exported at 30 and both results were bad (lines during movement, frame freezing, etc.).
Best results I found were keeping everything the same (24p timeline exported at 24) and laying the 24 footage on a 29.97 timeline exported at 29.97. Both of which came out looking flawless. The exported 30 timeline almost looked as good as the 24. Only thing that seemed different is the aspect ratio.
Kicker was it was a 48hr contest (scripting, shoot & edit). Not enough time to deal with unexpected problems. Was expected it shot in 29.97 since the rules said the submitted file had to be in 29. Then I couldn’t seem to fully remember what my teacher told me about shooting at 24 and editing in 30 (that was years ago). For me, I always want to shoot at whichever the output is going to be unless it’s for artistic expression. Like shooting at 60 editing at 30. But thank you to everyone for your replies. Everything seemed to work out well enough.