Her answers to my questions:
Do I need to be really worried about cross-contamination with utensils? No, just wash them well. (I still have doubts because so much of what I have read says to take great care in this area.)
What about supplements? Take a good multivitamin and take extra calcium and vitamin D. What about B vitamins? Oh, just make sure that they are in your multivitamin. (In my opinion, I get enough calcium from leafy greens and vitamin D from the sun, at least right now, but that I have no visible source of B vitamins.)
Recommendation for a brand of supplements that are GF? Oh, just research it on-line.
What about foods the TJ's foods that say that they are made with care but that they make no promises? Whole Foods has a better selection.
Anything you recommend? There's a really great cereal. Ammar... something in a big green bag. Really tasty. We got it at Whole Foods for my father.
Any other advice? Breakfasts out are hard. You should take your own box of gluten-free cold cereal when you travel.
In the venn diagram of my vegetarian-GF-booze-free chocolate-free eat-to-live diet, I think I will have to become my own expert.