Welcome from an Anacortesian. This is a good forum to belong to. I usually winterise by blowing the system out with compressed air, then just a cupful of the pink stuff or cooking oil down each P-trap and in the toilet bowl. We don't normally go out between early November and late March, so winterising more than once isn't necessary. We put the insurance into "Hibernate" also, a feature Allstate offers on its RV policies, where the on-road laiblity stuff doesn't apply until you reactivate it.
The RV is parked alongside the garage and this year we're trying the cover that came with it when we bought it. We didn't use it last winter.
Frank Damp -Anacortes, WA,(DW- Eileen)
ex-pat Brits (1968) and now ex-RVers, as of 08 Dec 14.