Either method is nice and quiet, so you shouldn't have to worry about drawing attention because of noise. I wouldn't try and go too far to "hide", as that in and of itself seems suspicious and would draw attention. What comes to mind for me is a parking lot and some type of rural event, where cars for the attendees are parked, possibly in a grassy field, and all of the attendees are attending whatever event is going on. This comes to mind because of an event I used to go to regularly that was held way out in the boonies. It was a antique tractor show/auction type of thing. Cars were all parked in a gigantic field and people went on to where the actual event was taking place. Everyone just went about their business and really never paid any attention to what anyone else was doing. Just a lot of coming and going. When people went to their cars after they had seen all they wanted to see, they just made a direct line right back to their cars. It's not like they paid any attention to others in their cars or what they might to be doing. Almost like hiding in plain sight. If you have tinted windows, I doubt anyone would notice you. I guess the only issue I could think of for this scenario is how you would get the charcoal grills lit, since you'd definitely need to light them outside the vehicle and wait until the coals were burning red/white hot before placing them into the vehicle. Not sure how to go about that. Have you done the calculations as to know how much charcoal you will need for the interior volume of your vehicle?
Maybe a campground where everyone has charcoal grills and you'd just blend right in.
