Best advice is your own advice. Think of where you want to live for the next 4 years in addition to the curriculum. Check out schools that will, first, most likely accept you (although a long shot or two is worth it, I guess) and then look at what schools you would like to attend.
Also, why are you thinking of 8 years? Dental school is 4 years. Unless you are a freshman...then stop worrying.
If you haven't applied, I don't think you have been accepted into the HPSP which is not as easy to get into as it once was. From personal experience, apply to the HPSP at the same time as you do your DS apps to get a head start on everyone else.
If you haven't applied, I don't think you have been accepted into the HPSP which is not as easy to get into as it once was. From personal experience, apply to the HPSP at the same time as you do your DS apps to get a head start on everyone else.