Ladies! I have some questions for you.

Ready? Okay, here we go!
We have the 150th anniversary of our fort my unit is based out of coming up this summer, I want to put together a nice ball gown for the event. (or even just a nicer day/tea dress, just something fancier than the work dress pattern I have).
Any suggestions on a pattern to use? I've been looking at some of the past pattern's dresses, what would be easiest? I want a nice dress that is suitable for a ball, but that I can still use for other activities.
Also, about a hoop skirt, how many bones? I know the more bones generally the fuller it will be, I don't want a huge skirt, I'd probably take out somebody or a table or a little kid! Haha! Would a 4 bone hoop skirt suffice?
I've got patterns for a chemise, drawers, and petticoats, and I'm saving to get a corset (pondered sewing that myself for awhile... but decided to pass, I'm not experienced enough as a seamstress to tackle that project. One day perhaps).
Okay, one last thing, I promise! What about fabric? I live out in the middle of nowhere and unfortunately the best place to buy fabric is the not-so-hot wally world *shudders* they have have a wonderful stock of polar fleece and modern flannel and cotton prints... and that's about it. I was thinking of a Taffeta fabric. Would that work? Any recommendations of a place I can order from? The cheeper the price per yard the better, I am trying to stay on some resemblance of a budget with this project.
Well, I think that's it! Thanks in advance for any replies!
~Emily