I always find myself answering last questions first... lol.
Mites aren't all that mobile compared to insects with a winged instar. Even thrips have a winged adult stage that exists briefly and can fly. Mites do not. They need to physically walk or be carried to a new host, except in instances of EXTREME infestation, when they have been known to spin little parachutes of their cobweb material and float there... creepy!
While you still have time, try to find a bug bomb that is nothing but pyrethrin, because it breaks down so fast. I think Doktor Doom is safe to use even in flower. Or hang a No-Pest strip- the chemicals outgas but do not actually get applied to the plant. Another choice is ladybugs. I have mites, but keep them under control with preventative neem and SMC spray and a healthy population of lady-bots. Even mites that are resistant to sprays cannot survive the chomping and crushing action of the sexy ladies MWAHAHAHA!!!
Try vacuuming the plants if you have a rechargeable Dust Buster, too, no matter how silly tht sounds.
You are at the end of the window where bombing is even an option, so you shoudl look into that right away while you still have a chance. Pyrethrin breaks down fairly fast in intense light.