Arriving late at night in SAP, make sure you have transportation arrangements to get to your hotel. The airport pretty much closes at sun down, as most of the employees want to get home before the bad guys come out. Car rental may wait for you, but I would advise against driving from SAP to San Pedro Sula after about 9 pm. There will be taxi drivers there, but it will be slim pickens.

You would want to visit Copan Ruins before the trip to TGU, and if you would have 5-6 days you could catch a flight (or ferry) to Roatan. Not much else.