They weren't buying gas. RT was buying ice. Getting your rig into a gas station that already has patrons (we don't know how busy it was at 9 am, but I'm guessing fairly busy) if you aren't buying gas is a pain, IMO. I agree that there's NO way he would separate the trailer from the truck (to buy gas or otherwise!)
Since LE says it has pictures of Barb near the spot at Kelbaker where RT said she disappeared, I"m not sure why anyone would start a search in between Needles and Mojave NP. IIRC, our VI says LE told him it was around 2 pm that the photo was taken.
I'm going with "Barb was still in the truck/trailer when they arrived at Kelbaker." I wish we had certain info about the time. RT would have known that police would not show up right away. There's approximately 1.5 hours between that photo, in any case, and when RT says he last saw her.
Yes, but google takes its photos in the early morning, often between 5:30 and 7 am. They do this for their own reasons. This was a Friday and I'd think 9:00-ish would be more crowded than 6 am. I agree it was a completely normal thing to do and actually was making the same point.
I wouldn't. I mean, I'd get it at the grocery store (cheaper) and put it in my freezer. I'd do this because getting off the highway when you don't need gas, just to get ice, is a pain, with or without an RV.
Since RT is also described as "naggy" (maybe the gas station was fairly busy and he was irritated? maybe their ice sign wasn't prominent? who knows?) and Barb was described as less cheerful than usual (by the kennel people), my point is that they both seemed stressed. It would have been less stressful had they gone to a store before the trip and loaded up on ice.
Living in a hot climate, many of us have several spare bags on hand. They didn't. Perhaps Barb was getting ready for her trip by cutting down on grocery shopping (no point in loading the fridge with stuff unless your husband is the kind who cooks that stuff for himself). Anyway, they sound stressed (a 5 day camping trip, followed by a brief respite, then a trip to Vegas to drop her at the airport, where she flies without a phone through LAX to Hong Kong...)
ITA that if the police show up (any place) and start asking for CCTV footage and interviewing workers, that does color what the interviewee is going to say (and remember).
I believe our VI said the photo was around 2 pm (but hasn't seen it himself, is getting that from LE).