anyone found a way to cover the holes from table legs?

Have you checked to make sure that they aren't installed over the carpet? Or vinyl? I looks like everything in our trailer was installed after they put the flooring down. Could be that all you will need to do is take the table out.

There's a thread about this subject HERE

If you want to make those flanges totally disappear, it is possible. I assume it's vinyl under the table? You'd first cut and glue and screw in patches pieces of plywood or OSB for the subfloor. Then cut out some patches pieces of sheet flooring from inside a hidden or seldom used cabinet, dinette bench seat storage, underbed storage, etc. Then go to a dealer or get a floor layer in to do heat weld the seams together. When done right, you'll never see it.