Unusable Jack Points on 04 Safari

[camarobob]

My 04, 25' Safari has two indicated jacking points located on either side of the underbelly toward the rear of the trailer. The owners manual states that if its necessary to jack up the trailer to only jack at these points. However both of the jack points are unusable. The jack point on the street side is blocked by the grey water drain line and the jack point on the curb side has a gas line running across it. (ppp)
Has anyone else encountered this problem?
I realize that ramps can be used to raise a wheel but If it becomes necessary to jack up the trailer what is a good/safe alternative jack point ?

[overlander63]

I generally jack up an Airstream on the axle reinforcing plate. It is the part that comes down from the frame, that the axles bolt to.

[idroba]

Yes, jacking at the plate as overland63 mentions is the best and most secure way I know. I was on the Alaskan highway once and had a flat on my single axle trailer. A passing truck blew it off the jack which was positioned at the designated jack point. The jack then punched a hole through the belly pan, and floor. It was a bottle jack. Never again will I use the designated jack points, too easy to slip off them.