Damp Rid makes SPRAY ON products to kill mold and take care of stains and block the mold from returning. One has a red nozzle and the other a blue nozzle. I found them at Lowe's in Washington. You might be able to find them online.
you can spray fabric and it's not harmful on skin - but don't inhale it (wear a mask) and wash your arms, face and hands after you spray every surface in the coach including the glass windows.
Get a room air purifier that WILL TAKE CARE OF MOLD - and use it as much as you can while you are traveling to take care of what's in the air. You can't get it all and a good air purifier will be worth it.
Sears sells a mattress cover - like tyvak. Flexible and not plastic. It goes on like a pillow case. Protects from moisture, bugs, mildew/mold resistant etc etc. Buy new pillows.