Do I have to notify the father if traveling within the state of FL?

I have a few questions which may help answer your inquiry. First, you said you are already divorced but do not have a Parenting Plan and that you only have what you described as ‘temporary custody’. I am not certain how you could be divorced without the court having decided the timesharing issues for your child, but that should be remedied as soon as practical.  Second, I do not know if you have a ‘temporary’ timesharing agreement with your ex and, if so, if your one-day trip to Disney would interfere with that agreement/understanding. You also did not state the nature of the relationship you have with your ex where your daughter is concerned. (That is, are you both highly cooperative where she is concerned or is this a high-conflict relationship with him.) Assuming that the information you have provided is accurate, that your trip is only for one day and does not interfere with any ‘temporary’ timesharing agreement with your ex, you should be fine with the trip from a legal perspective. However, as a guiding principle one parent should always tell the other if the child is being taken out of town particularly if there have no Parenting Plan addressing this issue. On a final note, if the Covid-19 virus is not particularly virulent in Disney at this time and your daughter is not immune-compromised, I would think this should not be a factor in your trip.  I hope this helps.