moisture IS an issue, but i think that the manner of dealing with the film leader is bigger with the small flange units like patterson and samigon are making.
when i screwed up my lens test spools i only had difficulty STARTING and FEEDING the negative through the ball bearing section on the roll i CUT the leader off of.
Once your reels are dry, (and it seems that they might be one more difficult over time because of photo-flo, so wash with clean water and a few drops of Dawn Sink detergent, also rinsed off), cut the leader off without leaving a winding sprocket cracked/broken and irregular, and do as the post above this recommends and pull the first few inches through the loading gate.
Getting the action of winding on with one side, ie the right, and switching over to the left hand to hold the film in place as you bring up that half of the reel can be difficult for some folks whom do no have good motor function in their hands, but with practice, can be overcome, just slow down your reeling on to a quarter (1/4) until you have the certitude of the process.
I have both types of reels, the System Four type and steel and both serve well, but I do reach for the steel first out of long habit and tall tanks.
In the end that's what it comes down to, personal preference and ability to do the work without becoming irked by the process and equipment.
Lastly, save your leaders and tails from your rolls for reuse in bulk loading new rolls for film, without the waste of sacrificing good film for those duties.
Happy Holidays and Godspeed to All,
Eli