Several posts mention jacking under the axle. That’s not a good idea. If they meant to jack under the shackles, that’s a different thing.
I have the Trailer-Aid and it works fine on our camper. Others have said it won’t raise the flat high enough. I also carry a 4 ton shorty bottle jack. And a 4 way. And a Dewalt 18V impact wrench.
The aluminum floor jack sounds good, too.
With all that, we’ve never had a flat on the road, just at home.
While on the road, I really like having the TPMS for reassurance.