I'm going to vote AGAINST the use of Trailer Aid, although you may find a use for it if you happen to have a flat in the perfect location, say a Wally World parking lot. A bottle jack (4-8 ton) with a little blocking is our preferred way to travel. We happen to have two, one that came standard on the new truck, and the 10-ton that came a few years ago from the Snap-on Tool Company....that's my first lie of the day.
It was bought on sale at Tractor Supply.
But hedgewald makes a good point: Be sure to put safety first. Jack stands are a good idea if you are in the neighborhood of home.