Two ways to consider your route - not knowing what your original routing was...
(a) Dallas | Monahans | Marshall | Dallas This is an out-and-back, but 'home' is in the middle of it -and- you get the bonus of it being an in-state ride. Now, along I-20, I wouldn't expect loss of signal, but if you're off on some of the FM roads, all bets are off.
(b) Choose your route to take you in some direction you haven't been. BMW RT Pilot has a good, simple loop and that would be a fun ride. I do like riding in the Piney Woods region, but it *does* get damn dark out there at night.
I think I'd also be considering a couple of simple 500 mile days, just to prove to yourself the bike isn't going to leave you stranded along the road again.
Good luck!!