Hi Folks
I guess what i should have said is:- if you bring your camera in from the cold or the wet it is a good idea to dry it off correctly then, let it acclimatize slowly then, to place it in a sealed box with silica gel packs which will absorb any excess moisture. (if you have any doubts that’s its really got damp).
.
**** Warning Boring text ahead***
Silica gel (or silicon dioxide) only "contaminates" if the environment it is placed in, is contaminated. (As there is no chemical reaction as it absorbs moisture, only if the moisture in the air holds contaminates). Absorbing moisture is not thought of as contamination generally, just the gel doing its job as it can absorb up to 40% of its own weight in water vapour. Used Silica Gel can be re generated by gentle heating which drives off the absorbed moisture.
Using Silica Gel is much more beneficial if you place the item to be protected in an enclosed airtight box (because you’re not trying to suck the moisture out of a whole room) But it still has benefits if it is placed in your camera storage because in an undisturbed case where the air isn’t changed much it should still keep the humidity down to a degree. (It certainly won’t have any negative effects). Especially if the place where you keep your equipment has a relative humidity approaching 50% it’s not so good. In open atmosphere Silica gel does not stay charged for long and as little as 15 mins, so it has to be stored in air tight containers and recharged before use normally.
Short answer is, if you have bags kicking around use it, if you dont dont worry about it. Silica gel is normally used short term for transit applications, but every little helps.
This is far too heavy now it'll frighten poor Amy to death!
You will be fine, don’t worry just take good care and it will last you a lifetime or at least until you buy a D800