I guess it depends on who lives close to your stores, but, based on the pins that are still available (and came out weeks ago) in stores near me, I just don't think it will be as bad as it is in the parks whenever they release pins. I have seen full sets, virtually intact, still in some gallery DS racks.
Don't wait too long, but if you can't be there when the stores open, hey, the pins will be there when you can make it! You can even ask a friend or relative to drive to his/her nearby store and look for what you want. In some states you can just drive from store to store within an hour, but could visit several in a day as well. I really don't see a reason for people to panic over these ones.
Wishful thinking, maybe. But I am basing my assumption on what I have noticed. Very, very few guests wear lanyards at the parks. I would even be daring enough to affirm that a very low, small number of guests collect pins. Some parks have very few CMs trading, even. The number of pin collectors seems high on the boards and auction sites, but the fact is that a very low percentage of the mall shopping population will run to get pins! Besides guys, please!: We're on the verge of a war here. The malls aren't going to be packed tomorrow!
In other words, try to get there soon, but get there when you can. Do not lose sleep over the anxiety of not finding these pins. They're not even limited and there are plenty of stores to get them from. I have volunteered several times to help people find the ones they want as well.
If that does not help, get this : I JUST FOUND OUT THE TDS 100 YR PINS ARE THE SAME!!!!!!!
So, relax.
It will be OK
Wanda