Ok from the sounds of it we are reading from the same book Danny, but from different ends. Here is the Short Short version of the book
Short term, Gas is better then empty (1day-1month max) Keeps water out
Long term, Clean and Dry is best, or drygas/stable if can't dry. (1month or more)
Although if you live where it never gets cold (unlike here) you can drive it every day and never worry one way or the other.
Would you agree Danny?