Typically a propane tank is full at 75-80%... Should never be filled to 100% - but stop when liquid comes out the bleed valve (and you can see where that is on the front of the tank...)
I'd expect you have much more than enough to run the fridge for 6 days if you needed to. But if the hotel has a fridge - you might only need it on the actual travel days.
The furnace burns thru propane much faster - but with the Orlando area in the 70's now - and 80's predicted for the weekend (no where near a white Christmas... lol) - don't think that will be much of an issue - even if you were staying in the RV..