Okay, I need to check out your blog (saw it yesterday, didn't click). We have dietary restrictions too and I'm always looking for new food ideas.
I live in Sugar Land and I have found enough like-minded people to feel comfortable. I'm part of a secular, inclusive homeschooling group, Learning Adventures at Fort Bend (Fort Bend County), and it includes crunchy people and people who don't care if I'm crunchy (and I've never seen/heard of people anti-my-crunchiness, so that's plenty good enough for me).
It's a huge city, so if you search out groups with common interests, there should be someone around. I do get a lot of my social interaction through our homeschooling group, so I haven't had to go much beyond that, but that's been my area of interest since we got here.
re: the heat, well, no fun, but you get through it.
And seriously, the homeschooling requirements (lack thereof) make life so much simpler. I think if kids have been in the local school district, you need to notify the district that you're withdrawing to homeschool (not an issue for you) but after that, you're good.
I haven't searched really hard for a HCP who can actually help us. I have a ped who's a backup in case someone gets hurt (cause I don't know a lot about injuries, but it seems like we could get past my ability to deal with it fairly easily), but I know of one or two people who have very alternative-minded HCPs. I just haven't had the need to work with them for our health stuff.
In general, there's a lot of agriculture around Houston, and being in Richmond you'll be more on the outskirts and should have better access. I go to a farmer's market in the middle of the city, which is an okay drive, but I'd hope there's something farther out that would work better for you.