I use ziplocks particularly for boxes I have aspirations about burrying for extended periods.

I have been ziplocking boxes for about 6 years now. Some of the cigars I have sampled seem to do fine, though I admit I have not really done much comparison as to what the development might be without the ziplock.

Opinions differ a lot, espeically with Cubans. Some say 70% is ideal for long term storage, while others maintain that the mid or lower 60's are more preferable. I've been storing stuff with the emphasis on staying between 62%-66% or so. I am certain (for my personal taste) low to mid 60's makes for a better smoke when dealing with Cubans, at least for cigars beneath 10 years of age.