Both "on the tour" and "on the trip" are correct. You could also say "during the tour" or "during the trip." To get the same meaning, the other two phrases should be "while travelling" and "during travel." (You'll probably never actually hear the phrase "during travel," though, unless someone is talking very generally about facts that are true about travel in a broad way. The closest common phrase would be "during my travels.") For example, you could say "I lost my suitcase while travelling" or "I lost my suitcase during the trip" or "I lost my suitcase on the tour." But it wouldn't really make sense to say that you lost your suitcase "during travel."

On the tour On the trip 5-8 need a context to determine which would be correct.