MOO BM was aware of vehicle internal GPS, and after GS I would think everyone is, especially in Colorado.
MOO that means if he did it, he managed it within a normal range of locations and activities in his truck, had an older vehicle to use or someone elses vehicle.
MOO To me this is why his trip to sell his truck in Indiana is significant.
If BMs truck used, MOO SM was at least temporarily hidden on whatever route and side trips the truck took between Salida Sandwich shop and Denver HIE.
MOO I believe she was temporarily hidden not necessarly returning to PP in early evening of 5/9 because of the "please the wife" anger thing was already in motion at 11am Sat 5/9.
If not for the Salida sandwich shop sighting I would say she was already dead or bound up ready to be killed by 11am on 5/9, because in a failing marriage, with alienation beyond the repair of bike rides and hikes, saying "keep the wife happy." It sounds dark and a ironic, and in character for murderer.
MOO, humans' keeping a secret of murder seems to cause them to make dark double entendre jokes.
Like CD's burning limbs, or PF saying people go missing every day.
BM and SM took a walk together Wed. 10/6 and seen by the B&B lady.
I wonder if she picked up any vibe that BM was being over solicitous to SM, as in coming through with too little too late?