I lived in Africa for 1.5 years.

I believe that ALL the malarial meds you need to take starting two weeks prior, plus some time after, you are in the malarial area. There is NO malarial med that covers ALL the (5?) types of malaria that humans can get. MOST mosquitoes do not carry any of the types of malaria that humans can get.
The biggest problem with malaria, is that if you get it but then do nothing. Also, if you are taking malarial meds, and then get malaria, the blood tests cannot tell if you have malaria, so, if you have malaria symptoms, you are forced to get the malaria prevention/eradication drugs regardless.

In your case, if it were me, I would not take any malarial meds.
BUT: If you have ANY malaria symptoms from after your trip, IMMEDIATELY go to a doctor and INSIST that they do a blood test for malaria. If you have it, and get treated right away, you will probably have no problems. The big problem is when you come back to the US from a malarial area, and get sick. The doctors in the US never think to give you a malaria test. If you have a serious case, and it goes untreated for an extended period, it can be REALLY bad!

I would only take malarial drugs if I was going on a short holiday (like 1 week-6 week or so holiday) to a malarial area. Short trips, I don't think it is worth taking them the two weeks prior, plus the time after. The side effects from ANY malarial drugs are serious, and you WILL get them if you take the drugs long term.

Note: ALL 50 states, INCLUDING Alaska, used to have malaria. The US did a great eradication program, and got rid of it nationwide. With Global Warming accelerating, we may to have be aware that malaria could come back...