I am no bulb expert, but I would go ahead and plant them at the normal bulb-planting time. My guess is that, depending on where you live, some of these bulbs probably freeze in the ground at some time or another anyway. I have never heard of freezing bulbs for storage, but I have stored and planted bulbs in all kinds of extreme circumstances, and they pull through fine. I have a bucket of spider lily bulbs someone gave me a year ago, and I never had time to plant them. They stayed in a bucket outside, immersed in rain water and sometimes snow until I took them into the greenhouse. They are still in the bucket - without ice and snow - and I noticed that they are all sprouting green leaves. They will be planted soon. Bulbs are tough and resilient, so unless you have hundreds of bulbs to plant that would require lots of space and time, I would go ahead and plant them and see what happens. Then you will be ready to answer the question with your expert knowledge the next time it comes up in a forum or a conversation.