Thanks for all the excellent ideas!
After reading everybody's input, I came up with a variation on the theme of having something to hold the bottle jack stationary on the frame.
My plan is to cut up some round metal piping into 1/2" slices (with enough diameter to allow the bottle jack top to be inserted inside). Then weld them to the bottom of the frame rail, three on each side, at the front, end, and middle of the TT.
As for cribbing, I always carry 8-10, 12" long, 4x4's, on each trip, so I'm good there. Also have some that I've "tapered" to allow lifting of one axle for quick, easy tire repairs.
On a side note, during my 6-bolt, axle assembly (leafs, axle, & brakes) replacement, I was surprised how heavy it was---almost 200 lbs. Can't imagine trying to do this without two jacks, one on each end. Re-positioning the leaf springs (on the axle) so they'd line up with the frame hangers (and square with the frame) was especially a fun task--lol!
Thanks again for everybody's input!
