The stick on oil pan heaters work REALLY well and don't use much power, you just need to patient with the install. I don't think there is such a thing as a CCV delete "kit". Everyone has their own idea about the CCV but for sure if you can get a little bit of fresh air into the crankcase it will help tremendously with the moisture problem. You're lucky you just blew out your valve cover gasket. I imagine they were aftermarket gaskets?

You might try taking the oil cap off with the engine idling for a minute before you shut it off to get some air into the crankcase. Dropping down a gear will do little because the crankcase is sealed. CCV= CLOSED Crankcase Ventilation.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)