If you don't mind taken the ride to camping world there is or was a person who filled tanks located in there lot to the left of the store i have used them in the past they will fill while you wait
disney is a drop off and pickup at certian times if you run out over night you will have to wait to morning trust me have done this once in jan with freeze warning me,wife and 2 dogs had to sleep in running truck in front parking lot to stay warm not fun i thought one tank was low and other full boy was i wrong one low one empty was more like it and that camper was running heat ,stove,and hot water off gas (no electric water heater)luckily no pipes broke and we got propane the next day and enjoyed the rest of trip now my wife checks propane and won't let me forget it