Roland
The filler I sent you ought to be just right to bunch up as it is. Long as it doesn't crumble or crack when you fist it up, then you are good to go.
The binder will probably not require moistening either. Just stretch it out, get any rough edges off, like the stem, and go to work.
Far as the wrapper, you can spritz it with a spray bottle and stick it back in the bag for an hour or two. That ought to make it limp as can be. Then spritz the surface you are rolling on. A wet surface helps to hold the wrapper down so you can cut it accurately and wrap it tight.
I like to dry off the board between each wrap so I can roll the cigar back and forth on the board to soak up some of the damp and to even the roll.
I keep everything in its bag, and just pull a leaf out when I'm just about to use it. Even so, I try to pick a damp evening (of which we have plenty and plenty) to do the work. When I'm done with a session, I roll the end of the bag up two or three folds and tape it down.