I believe I know the Doug for which you speak. He is full of wisdom. All who have responded so far are all Premier members and do more than Certificate rides. Rallies and themed rides are a bit harder and we use any and all things we can to get that edge including redundancy. Heck, that's half the challenge but I digress.
Everything is based on what you want and how much you want to spend. Garmin's Zumo XT is their current state of the art GPS for motorcycles at between $350 - $400. It is daylight readable and glove friendly. I have borrowed a friends for a ride and it is nice but it didn't like my Mac. I am retired and on a fixed budget so I went to E-Bay and got used Nuvi series GPS's for around $15-20. I mount them so their in my face and I can see the screen without having to look down. They don't bluetooth to my helmet but that is what the app on the phone is for. This setup has serve me well. I have a sun visor for the day and cover them with a ziplock bag in the rain. They have been saturated several because I misplaced the ziplock or forgot to cover them and it rained overnight and they still work.
I have had issues using Spotwalla on Certificate rides this past year. One being a Spotwalla Glitch and one self inflicted. That is when I started using two iPhones with Spotwalla for tracking. I upgraded to a newer model and I use the older one connected to the bikes power in the trunk running SWConnect connected to Spotwalla via the other iPhones hotspot. I assume you could do the same using bubbler. I'll have to try that on my next Certificate ride. I use my new iPhone for turn by turn navigation in concert with my Garmin GPS for which I have a backup in the trunk as well. All of the navigation devices and apps are loaded with the same route and waypoints.
The phone based tracking works well if your doing certificate rides up and down interstates. Back road are usually not a problem either as the data usually gets buffered and sent once a signal is once again received. I've been doing it this way for over five years but I have always had a Satellite based GPS because I traveled out west and prefer not to be on the beaten path. If your usually riding solo in areas with spotty cell-signals, then you might consider getting a Satellite based tracker, I'd go to the f
indmespot.com website and learn whats available. There are a plethra of used Spot devices offered on E-Bay