Laws on this vary by state. Generally, a handgun not secured, within reach, and not in plain sight is considered concealed, even if in a locked compartment. For specifics in regards to your state, we'd need to know which state that is.
Unloaded and locked in the truck, with the ammo stored separately.
Yes, in Texas one can carry a hand gun in the motorcycle saddlebags. A person can also carry a handgun in plain sight while traveling.
If you do not possess a licence to carry a concealed handgun, then any handgun you carry in your vehicle which is within reach and not in plain sight must be unloaded and secured. This means cable lock, trigger lock, locked case.. something of that sort.
Yes, in accordance with the laws of the state(s) the driver is traveling through.
If the firearm is unloaded, in a case, and locked in the trunk or toolbox of a pickup, yes, should be legal. There is a Federal law known as Peaceable Journey that covers this. If you do not have a trunk or toolbox, then unloaded, and in a locked case (not the glove box).
yes if it is in plan view and unloaded
You mean can you transport a gun while traveling? Yes, if it is a gun you legally own or possess. You should check with each individual state you are traveling to and see what the laws are.
Yes. They must be stored in accordance with the laws of each state you'll be traveling through.
Why would someone want to do that?
unknown
Recently, to view the Olympics.
You may ship a handgun to yourself by UPS or FedEx. Both require next day Air, which is rather expensive. You may not MAIL a handgun by US Mail unless you are a dealer. It may be less expensive to pay a dealer to mail it for you. If traveling by air it is possible to check a handgun with your airline as CHECKED- not carry-on- baggage. Be sure to check Hawaiian law- fairly strict gun laws.