When I am hunting I use three or four of the little silicone squares that Ron has shown. One in each of that many pockets makes it almost fool proof as to getting primed. Weather and water tight too.
I use the plastic containers that medicine came in. That child/adult proof cap tab has been removed. Carry at least two as I'm not going down to get it when it it slips from my hands.
I bought a T/C U-view capper tool for 209's
years ago before I switch to the 209 system we sell... it stays in a sealed ammo can most of the year and gets moved to my possibles bag when I hunt. I just push a single primer into my hand... that I then place with my fingers in our bolt nose...
I have a primer in each of my speedloaders but I also have a couple in each of my front pockets. If I need a primer in a hurry I want them to be wherever I reach.
I carry 2 of these tc u-view on a lanyard around my neck to hold 8 primers and powder in 4 tubes and bullets in 2 tubes. And i always stick 2 more primers into the screw holes in the recoil pad as emergency spare.