In the short term, I would suggest taking your meter with you and when taking a break (or after a specified time/distance) perform a check. I do a check @ 20 miles.
I also use the CGM as a guide, but always have my meter with me. In part, this is because I have the same issue with false lows and once low, it takes a long time for the CGM to get back up to speed.
I also carry a Clif Bar with me in addition to my glucose tablets.
In the long term, if you really enjoy riding, buy a recumbent tadpole trike! You won't have any balance issues and it's like riding while lying in a recliner. Also, it's every bit as much exercise as riding a two-wheeler, but without any pain in your wrists, neck, back and in between your legs(!).