If it was me i would....
- gather up some short pieces of 4x4, 2x4 and 2x6.
-make a stack of wood blocks under the side of the axel you have jacked up so that is reaches about 1/2 the way or so between the ground and the axel.
-lower the jack down, slowly and set axel on the wood blocks.
-take a few pieces of short 2x4 and 2x6 and place them under the jack base and then jakc it back up so that the axel reaches high enough for you to get the other tire back on.
-replace tire, tighten lugnuts, remove blocks, lower jakc unough so that tire hits the ground and torque down the lugnuts some more, completely remove jake.
If the trailer was jacked up on gravel or dirt surface, i would just dig a hole with a hammer enough to get the tire on the lugbolts(as was mentioned earlier).
2009 F-350 FX4 Crewcab 4x4 6.4l
former '78 Argosy 20' Minuet owner
former '77 23' Safari owner
former 25' Fun Finder X-250BHS SOB owner
current 26' Komfort Trailblazer 262BSLE SOB owner