It means that there was a a provisional plan for her to travel to Aruba (which probably did not happen - although we don't have the rest of the story in your sentence...) You could replace this with: - Her intention was to travel to Aruba. - I understood that she planned to go to Aruba. - She said she intended to go to Aruba. However, this plan was not very concrete. This is indicated by the use of "kinda" = kind of = sort of... "Supposed to" indicates an assumption: He is supposed to come to dinner tomorrow = he has been invited but I am not sure where the he will actually come. (Or: He said he would come, but he is not a very reliable person, so I'm not certain that he will come...

"she was supposed to" is the same as "she needed to" "kinda" is an even more colloquial form of "kind of", which is the opposite of "very", "she was kinda supposed to" is the same as "she needed to a little bit" (the obligation was small)