Adding Delaware to the list above.
As Melanie said, your best bet is to get a scholarship from the program. There aren't many national scholarships for PT students. And they are usually fairly small awards; $1000-$5000 one time award, etc. There are some national scholarships for health/medical students, but you usually are competing against MD, DO, pharm, etc. students.
It's worth contacting schools early and asking about what scholarships are available and if you would be competitive enough to receive one. Some programs do not advertise the awards, or only give them to applicants who attended undergad at their institution. Some schools offer the scholarships upfront in the acceptance letter, while other schools wait until they have finalized their incoming class and then award them.
Along with scholarships, many programs have separate assistantships or fellowships. Depending on the program, in return for 10-20 hours of work per week, you might receive a stipend and partial or even full tuition scholarships. Being from Ohio, I know that Ohio University has a great GA program that you apply for once you have accepted a spot.