My opinion on the malaria pills. Have some treatment with you (quinine) and ONLY if you get the symptoms then start the treatment. You dont know for how long you are going to be here and taking these aggresive tablets for three months non-stop or longer....EISH.... your liver and kidneys are stuffed for life!
I used to work in the tropics of Mozambique on the Zambezi river and nobody in our area took malaria pills. Only started the treatment once we got the symptoms.
Anyway, just my opion, It's up to you what you want to do!