Wow. I really would like to thank everybody for all of the comments. I never expected this kind of response, but I am very grateful for all of the information and support provided.
I wanted to address some of the questions posed, and provide an update to our current position, decision-wise. First, I absolutely agree with you, Daryl, that fear and doubt are holding us back. My husband and I get excited every time we talk, but then the inevitable "are we really going to do this" will arise. We have finally spoken with our son frankly and seriously about the possiblity of homeschooling, and he seems to be mirroring what we are feeling. He acts excited, and then he says he isn't sure. I believe that what he's most worried about is maintaining current friendships.
Secondly, I would like to thank Unique for reminding me about the "What Your XX Grader Needs to Know" books. I had managed to forget (how, I don't know, as it had been a major selling point for us) that the Core Knowledge curriculum that our charter school uses comes from these books.
As I was fretting about this publicly, my husband was quietly going about his research. As we pored over all of your comments, he kept saying, I have that link saved, and that link, yes I read about that... He also found a list of reasons to homeschool that really hit home. After our son read the list, I asked him what he thought. His response, complete with big grin, was, "I'm thinking about homeschooling!"
I must say that I already knew, in my heart, everything ya'll have said. I just wasn't able to bring it to the surface and put it all together. After discussion, I think I have to admit that the inept 'grads' I have met or known were just victims of bad parenting. I had forgotten so many things in my worry. My cousin homeschools, and their daughter is wonderful. My in-laws (that we live with) are UU, and they have a homeschool group at their church. And, I actually used to work with the woman who led the homeschooling charge here in Texas!
It was so enlightening and inspiring to read all of your comments, especially the 'we did it, you can too' ones. I have to say that they reminded me that maybe, just maybe, we wouldn't be all on our own.
I do need to address the comment by Cygknit, as she has known me for a looooong time. It is more a question of how everybody's needs would fit together as a family with all of us managing to stay sane. (Tips on alone time for the parents, anyone?) Because I know I would do a good job teaching even though I'm not a 'professional.' (A friend at work made me feel really good when I told her about our recent thoughts. She said, 'Wow, you'll be great, can I come, too?") You know you would be great, too, Cygknit. You may have forgotten our plans from some time long ago to have our own small community with our friends.... Ahem, I believe you were going to be the teacher...
As it stands now, if we can all get just a little past our nervousness, I think we are most likely going to be trying homeschooling this year. We have to make the official decision by Friday, I think, so that we can withdraw from the charter school.
Thanks again, everyone, and, I'll 'keep you posted' :)