Motorists in Florida will be driving into the Thanksgiving holiday period with gas averaging from under $2.90 a gallon on the western Panhandle to nearly $3.30 in the Florida Keys, according to the AAA auto club. The average gallon of regular unleaded gas was $3.12 on Sunday, a penny lower than a week earlier. But the auto club warned of increased pressure on fuel costs amid record traffic expected during the upcoming holiday.