Do they weigh your luggage or does all your stuff just have to fit into the duffel for the air flights in country and between Tanzania and Kenya? I am finding the weight of the over the counter medications I am brining, supplements etc putting my duffel over 33 pounds and closer to 40 pounds….Is this a problem? I will try to skim down the OTC stuff but wondering how precise I need to be….I think I was a girl scout in a prior life(lol) and so over think what might be needed in case we get sick with x,y or z….thank you!!