New oil will collect the same amount of condensation as old oil so I don't see the advantage of putting fresh oil in at the beginning of storage, unless you are really past due for an oil change. To get rid of the condensation you'll have to throw that new oil away before you run the engine next year anyway.
The most damaging condensation is going to be on metal to metal parts, like rings, cam lobes, etc., and you're not going to get that removed by just draining the oil. To get rid of that condensation you have to get the engine to operating temperature. This is not just 3 or 4 bars on the temp gauge as this only tells you coolant temperature and not engine component temps.
Basically, you need to get the engine hot enough to turn the internal moisture to steam and then it vents out of the crankcase.
The only moisture you can remove by draining a cold engine is that which has pooled at the bottom of the crankcase. It is unlikely that you'll get a significant amount of water pooled at the bottom of your crankcase, but still, you may not want to start the engine before a drain.
The real issue is how well the internal components are protected against possible moisture damage. The best thing to do is use an oil that resists moisture damage. I know I'm beating my drum again but a true synthetic oil (which BRP and many others are not) will give you the best protection against moisture damage.
Here is a great article on the 10w-40 True Synthetic Amsoil for motorcycle engines. This is the oil I use but there are a few other True Synthetic oils out there if you look. Yes, this information is produced by Amsoil but it is scientifically achieved using actual oils and industry standardized tests which are verified by 3rd party labratories. It isn't the typical cherry picked marketing hype that you can get elsewhere.
http://www.amsoil.com/storefront/mcf.aspx
Bottom line, I think most good oils will give you adequate protection in most situations. The longer the engine is stored and the more extreme the potential for moisture damage, the more critical the oil you use will be. Some otherwise good oils do not have very good moisture protection properties. But it can be hard to get this kind of information to know for sure.