I have the same problem. My solution was to add a battery cut out. See: https://www.amazon.com/Post-Battery-Master-Disconnect-Switch/dp/B001N729FS/ref=sr_1_4?crid=2MZQYP8XQUICI&keywords=battery+disconnect&qid=1564867364&s=gateway&sprefix=Battery+di%2Caps%2C214&sr=8-4
Note: the CRV battery post is smaller than standard, so you might need a shim. See: https://www.amazon.com/Schumacher-BAF-2-positive-negative-batteries/dp/B0060YI0YS/ref=sr_1_1?keywords=Battery+shim&qid=1564867989&s=gateway&sr=8-1
We use the valet key when towing, attached to it is a 3x5 card with the tranny routine and the radio reset code.
Norm