explain to them that the more they assist you, the better the experience will be for their DD. and make clear by assist that you mean helping to tie shoelaces when players have they have batting gloves on, helping catcher on/off with the gear (trust me, at 10 u rec most girls will need this, and you really should have everyone willing try it at least an inning or two, but different topic), making certain of lineup, etc.
Also stress need to know if anyone will miss or be late as early as possible. I always did lineups ahead of time, on paper, inning by inning. helped track of playing time, including how much was IF and how much was OF. cuts down on compliants when you know you have numbers to back up your assertions. doing this ahead of time (and if any last minute changes, write em down) helps you get them out of dugout faster for defense.
Also stress need to know if anyone will miss or be late as early as possible. I always did lineups ahead of time, on paper, inning by inning. helped track of playing time, including how much was IF and how much was OF. cuts down on compliants when you know you have numbers to back up your assertions. doing this ahead of time (and if any last minute changes, write em down) helps you get them out of dugout faster for defense.