Covered with mud?
Don't forget the other end - 1/2" wrench for those (they should be 5/16"-24.)
Replace all the bolts while you've got them out - it's a funny habit I've got, and cheap insurance to boot. The yoke bolts should be either 1/4"-28x3/4" or about a M6-1.0x20m/m. The bolts from the transfer case into the driveshaft are probably 5/16"-24x1" or so - check to be sure.
Either way, would you let me know what sizes you use, and what year/engine/drivetrain you've got? I'm compiling a list of bolts used through the years...
If the joint at the axle sticks, a long screwdriver passed between the joint centre and the yoke usually serves for that. Have a roll of masking or electrical tape handy (easy to remove) and wrap it around the caps so you don't lose any.
It helps to paint a little Never-Seez on the caps before you put it back in - makes it a little easier for the next time...
5-90