Best setting

[clntigger]

I am going to be shooting a family photo shoot of about 10-12 people and it will be by a sunflower field anyone no which setting would be best to use. there are three young children so the faster speed will probably be better. but I dont want to put too much attention of the sunflowers. im still kinda new at this and I am a self learner so i pretty much learn as I go. Plus anybody have any ideas for using the sunflower field. i have a few could use a few more. usually things just fall together when i start taking them. I mainly want to know the best setting to use. I have a canon rebel eos xsi 450d havent had it long still learning thanks for anyones help i dont have an actual webpage yet but i do have a facebook page if anyone is interested in looking at what i have done so far. I can use any feedback on my work to help me get better. here is the url for my facebook page.

http://www.facebook.com/pages/Owensboro-KY/Cindy-Napiers-photography/104871022890565?v=photos

thanks

[Gatorboy]

Manual mode at f/8. Adjust ISO and shutter speed as appropriate.

[clntigger]

thanks ill try that.