I'm not sure you have a better chance during the holidays. I've heard both sides. Is it a perfect time for the HS/C crew to hire seasonal folks or redistribute personnel? I've heard both theories: 1) too much mail to handle; 2) more employees to handle the load.
I'd actually recommend Nirvana, if you can deal with the strains, as I can, easily. Dr. Chronic and Seed Boutique both might as well label their packages "Cannabis Seeds - Please Don't look Inside".
As I've stated elsewhere - their so-called stealth shipping is like comparing a Sopwith Camel to an F-117 Nigthhawk. Your Mileage May Vary, but I don't give a shit about YOUR mileage, I only care about my own.