Mounting a TV to an Interior or Exterior Wall
You are talking about an exterior wall? Typically, exterior walls are 1-1/2 to 2 inches thick. The wall thickness needs to be determined, and the stud location if there is one, and if not, then the location of any backer if this is the location intended by design for mounting of a TV. Start by examining what the wall thickness is at your door and window frames. Some stud finders may reveal where the stud and/or backing is. Drill small pilot hole(s) where the mounting holes of the base would be positioned, until you locate a stud or backing. You could probably then go with 1-1/2 inch screws.
The same applies for an interior wall. But use shorter screws to begin with.
Some mounts are removable from the base. If you don't think the TV is secure enough, then disconnect it from the power cord and cable wire, remove it from the base, and lay it securely on the bed while traveling.