A.L.
I sort of got "gifted" with a Daisy troop this year - our leader moved after our second meeting, so I got to start from scratch, too - and I started out pretty organized - but really? Most of our meetings get a little chaotic towards the end - heck, towards the middle - the girls are only six, and it's hard to hold their attention for complicated stories and projects. Once I let that go, it was a lot less frustrating! At this age, it's mostly about giving them a positive social experience, while learning some of the basics of scouting. (Which is what the petals are for!)
I have also found that there are some rules you absolutely can not break - safety rules, and financial ones - and some that are...flexible. For instance, you can make up your own time frames, ceremonies, and meeting procedures, and there is some flexibility for your uniforms, too (as long as you are identifiable as Scouts and as a troop in public).
I like the t-shirt idea a lot.
I also have a couple of websites that might be helpful:
For leader support:
http://gsleaders.org
http://girlscoutspirit.typepad.com/girl-scout-spirit/
For meeting/activity ideas:
http://www.makingfriends.com/index.htm
http://www.dltk-kids.com/
And don't forget pinterest. There is a LOT of Girl Scout stuff and ideas on there. Meeting ideas, create-your-own ceremony blogs, craft projects, field trip ideas....
Please message me if I can help more!