Testosterone injections on field/ camping

I have an over week-long field-school in the lovely Texas heat (highs of ~96 F/ ~36 C and lows of ~72 F/ ~22 C). Running water is not 100% guaranteed to be potable, though there should be a source during the work hours. What should I do?

I do weekly sub-Q cypionate injections and would rather not risk getting the symptoms from missing a dosage while doing outdoor stuff. I have a car and a tent, and dont worry about myself in the heat and humidity.