G’day Pete, there are two trains of thought when it comes to storing LiPo batteries, some suggest they should be stored with a “Storage Charge” (one of the LiPo charger settings) which is a bit above 1/2 charge however I have always stored mine fully charged and then just top them up before usage.
The Eneloop batteries are LSD (low self discharge) so will hold a charge (typically for over a year) however I would remove ALL batteries from any equipment not in regular use.
Just my thoughts & I’m sure many will argue against it but I have Eneloop & Turnigy LSD AA & AAA cells over 8 years old and still going strong and many of my LiPo batteries are a similar age and apart from one or two that eventually a cell failed in any other replacements have been due to “catastrophic trauma” from impacting the ground at a great rate of knots.