Yeah, hope you're okay. Sounds like you had an unpleasant experience.

I love my synthetics, and wear them all winter. Nothing is more comfortable for me. No worries around a campfire except occasional "proof marks" from sparks. But the thought of a fuel fire scares the dickens out of me; I take extra precautions and/or switch to wool underwear in some situations.

I periodically look at the flame-retardant synthetics marketed for oilfield workers, but recoil in horror at the cost. Plus, I don't know if there are any health issues with the treatment chemicals; more research required. I did see a fleece hoodie the other day that felt like really comfy stuff.