As far as flying, all you can do is keep an eye on the storm's track. If you see it approaching Orlando on the day you are scheduled to depart, you will probably need to change your flight. The big issue is that everybody else flying that day will be doing the same thing, so you have to decide if you are going to take what you can get after it passes, or try and get out before it gets there. Airlines are flying full planes a lot these days, and it might pay to keep an eye on things so you know as soon as a weather advisory is called.
Right now you probably need to watch if you are flying Monday or Tuesday. But we don't know what Erika will do. She could turn away, fall apart, speed up, slow down, strengthen or weaken, stall or speed through.