Those posters who are showing interest in wrapping a laptop in plastic or clear envelops should consider that most require free air circulation in operation, to dissipate heat. If you cook a laptop it will not last.
SSD drives are statistically more reliable than mechanical spinning drives.
As for the corrosion
issues, rusting USB connectors etc. this is the most problematic, as salt
air is the enemy and it's difficult to deal with -- even if you never take the machine outside the cabin
. Conformal coating (boesheild) works but will attack LCD displays, so keep it away from those components. You can reduce condensation
if you put the machine into a padded sealed case immediately after shutting it down (while still warm). Don't leave it sitting on a table or shelf in the open air, especially when dew is forming.