I just finished adjusting my brakes last week. I used a bottle jack under the frame (not the suspension) just back from the wheels to lift the side of the TM (easier than jacking it up), and then I lowered the front and rear jacks on that side to support and stabilize the trailer before crawling underneath of it.
The adjusting procedure is described in:
http://www.trailmanorowners.com/yabb...80&start=0
See Denny_A's response.
MikeD