One thing I do in cars to help with problems I have riding as a passenger is to read a book. That way I have become one with the book and the book isn't moving so it takes much longer before my body starts to get upset with me. Poor air quality usually pulls me out of the book and causes me to freak out at some point. If I don't read in a car, I feel like every cell in my body is moving around in a direction the car isn't going. It is upsetting and exhausting. This effect is even worse if the road is bumpy or there are quick light changes (light passing through trees or tall buildings).

Your daughter sounds like a creative extrovert. Once you help her to figure out how to manage some of the more publicly embarrassing signs of SPD, she will probably need more interraction with children/people than just your family. I am a creative extrovert.

-She touches everyone!
-When she cuddles or sits on the sofa with someone she nearly smothers them.
-She talks to everyone!
-She will interupt and not even realize it until we point it out then she apologizes politely and then seconds later continues to interupt.
-She tells everyone a story!
-She insists on talking all the time, even if she's not being heard by someone. She'll talk to someone across the house.
-She loves hugs and to be held.
-She likes to be the leader of everything. When playing if she can't have the control she cries.

With the exception of the crying if I don't get control, this could have described me as a child. After some correction from family and friends of the family, as an adult I am able to tone this down. However, I need to be the person that creates new groups of friends, pulling people together, and telling stories that get the groups interacting. I LOVE to throw parties. Board gaming parties, but still they are parties with 6+ people at them at a time. I will talk to any random stranger in any random location. I NEED to do it and I feel like a failure when I haven't met enough new people in some amorphous amount of time. This is a personality quirk of mine and this extrovertedness isn't part of SPD. SPD just adds a richess to the experience.

I tend to befriend other people that have "quirks", so many of them end up having mild to moderate cases of SPD. They all appreciate the deep hugs I insist on when I meet them again or when they leave my home. In many of their cases they unconsciously "request" the hugs as well.

A meat light diet won't hurt your daughter, especially since it sounds like there are some meats/protein she will eat in moderation. You can also make complex proteins using rice and beans/lentils that can work as a dietary replacement for meat. I did that for a while when trying to find out which meats I had a food allergy too. Turned out to be just Pork and most Fish. Additionally, any meat that contained a large amount of Corn like Corned Beef, was going to cause an allergic reaction due to my food allergy to Corn.

Texture wise for me, Brocolli, Califlower, Potato Chips, and anything "crunchy" is just plain unacceptable and it takes a lot for me to eat them. Due to my food allergies, only the Brocolli and Califlower are ones I have to force myself to eat since they are "safe" for me to eat. I have found that stews, soups, and dishes where they are cut up as fine as possible are the only bearable way to eat Brocolli and Califlower.