Hello and welcome to FF! Interesting situation, because frog is still in the wild and feeding itself. Well, I would not leave water dishes because of possibility frog would pee on water and later continue to use it. That could lead to "Toxic Out Syndrome" and make things worse. So just let the frog manage by itself until your return. Maybe you can move plants closer to porch edge so they get wet with rain. By the way, if misting frog, make sure you use dechlorinated water and not straight tap. Good luck!