mounting hand-held shower head bracket.

My new master bath has a nice shower stall with a regular "rain" style shower head overhead and also a separate hand-held head, with a diverter valve managing the two. they will not be on at the same time. the hand-held has a bracket that mounts to the stall wall (just a bracket -- not the adjustable bar type). I want to hang the bracket adjacent to the line out on the wall, and high enough to serve as a regular head when its set in place in the bracket. but I'm a bit nervous about the bracket mounting -- its just two screws and plastic anchors and has to be screwed through tile. any tips, advice? I'm just afraid the bracket will not hold up with continued use -- particularly from my two daughters!