Been there done that . Over time I’ve changed my pre boating routine from always turning over the motor the night before to avoid ramp embarrassment to investing in a Ctek trickle charger as I don’t get to use the boat as often as I’d like. I now also have a cheap eBay Bluetooth battery monitor that I can pair to my phone and check the battery Is charging from my lounge chair. As a final strategy When launching I always start her up before She is off the trailer (one less thing to do if she doesn’t start). If I see someone struggling to start their boat I’ll always offer some reassuring words, simple things like kill switch, neutral gear, fuel bulb. Sometimes in the panic at the ramp people forget the basics.