I keep mine in the freezer. You just can't give the bees too much at one time due to SHB.
Being as far north as I am, SHB isn't a huge concern. Winters can seem to last forever, we just broke a 2 1/2 month cold spell with temps staying below freezing for the most part. My bees are coming from the south so for this first year I'll be a bit more watchful for them and hope the bees will build their numbers up to combat any SHB they might have brought with them.
Just keep your pollen patties from drying out. I left a 5 gallon bucket of mixed patties in storage for two years and its fine!
I didn't know if pollen patties spoiled if left unrefrigerated.
Next. Pollen traps can be very hard on bees. The two best i have seen are sundance, and dadants cedar traps. I have used dadant for years with minimal bee damage. I have seen sundance used with similar results.
I was looking at the Sundance top hive trap.
Now why do you want to feed pollen or patties? There are times of year, but not every year where its critical. What is your thoughts on why to feed pollen?
Ideally, I won't have to feed the bees at all, Mother Nature doesn't always cooperate though.
This year we're having a late spring so by the time I get my bees next month, there'll be enough pollen in the area to take care of dozens of hives...with plenty to spare. That doesn't mean there'll be enough at the end of the year for a good stores for the spring brood.
Basically, I hope for the best but want to be prepared for the worse.