Jacking/Lifting Trailer for Wheel Bearing/Brake Service?

Hello-

Preparing to complete bearing service in the next few days.
Read owner's manual and it states, "Position a hydraulic jack on the frame close to the spring hanger."

I've also red of others using bottle jacks directly under axle U bolt shackles; perhaps their owner's manual suggested this.

When jacking, I would chock opposing wheels and may even attach tow vehicle for added support.

I have a tandem axle leaf spring set up, with an equalizer between each set of springs.
4400# AL-KO axles. My axles are BELOW leaf springs.

My frame has an underbelly cover and the frame is not completely exposed, (about an inch is exposed on outside edge), and rear axle hangers are several inches in front and about 15" at rear of where I could jack at frame (due to obstructions one frame).

Are there other SAFE options?

NOTE: The trailer will have to be lifted and supported for a few days while I work on bearings/brakes; one side at a time.

Also, where should jack stand be placed? This is not mentioned in owners manual.

What about those plastic wedge aids that you drive trailer onto? I've read mixed reviews about their ability to raise adjacent wheel off ground high enough to remove a flat tire. Read that they are only good for torsion axles and NOT for spring axles.

I can also make set of wood wedges using cut sections of 2"x6" that would work the same way as the plastic ones....but this may not work since the plastic ones appear not made for leaf spring axles.

Also, found this.... Bottle Jack Buddy

My jacking goal is to jack up at home and on road safely. Jacking would be for... changing a flat tire, servicing bearings and brakes, or performing other axle/spring work.

Thoughts?

Thanks!