All the particles are OK for freezing, although there are a few precautions.
Always make sure that you freeze them with enough fluid, otherwise they can become burnt.
They also don't seem to be too good with long term freezing, e.g. longer than 6 months.
This is to do with the ice crystal formation and can cause the particles to float, I've even tried to rehydrate them as they thaw, but to no avail.
As for another article, I will follow it up with an in-depth one detailing the preparation and application of one particle, probably maize, as I feel this is underused and is probably one of the best carp baits available.