Man I wish I was closer. The best part of offroading is a recovery operation IMHO. Lotsa BSin, MacGuyver style ingenuity, maybe a few beers, just always ends up being a good time.
I've pulled two vehicles that size from similar situations with a 75 F-250 runnin twin 60s, 38's and 4.11 gears. One was a semi in a dirt lot that sank in a mild rain overnight, I was able to stay on a paved road and it was still an adventure. The other was a 1300 gallon septic truck a friend sank in a wet pasture while full. That one took two days, a lof of digging, homemade traction ramps about 8 ft long and lots and lots of wheel spin and flinging mud. If you have time, the traction ramps may be a good way to go, but its a lot of work to get the ground dug out so they can be effective.
If you are using logging chains make sure and pull the slack out of everything gently and dont try and jerk it out. With that much length, a failed chain is gonna have a serious amount of energy stored in it and could really hurt someone.
Other than that, please take pics of the recovery and try to keep a good attitude about it all. No one wants to be in that spot, but since you're already there, have fun with it.