Another factor to consider this time of year is the location of the vendor to decrease the chance of the feeders thawing during transit. If you're on the west coast then Layne Labs may be your best bet.
As an example I order feeder piglets for my larger snakes but the seller is in California. Even though the pigs are frozen, wrapped, and shipped in a well-insulated box with dry ice, since they take 5-6 days to arrive the pigs would likely thaw by the time the land on my doorstep if I placed an order today. So, I try to place a huge order in April and then I don't have to order again until October.