A whisker pole should not be set so far back that it is anywhere near the shrouds(wires, the spreaders are the wing-like things higher up that hold them). The whisker pole should be about 45 degrees. It also should be longer than a spinnaker pole, though a spinnaker pole works, just not as well as it could. A good length on a 382 is about 20 feet. Maybe even a tad longer.
I agree on the foreguy, afterguy, and topping lift. You should have all 3. Here is how I set it up now, which works well for single hand sailing with the pole.
The jaw that the sheet goes though needs to face down. This is opposite of a spinnaker, where it faces up.
A foreguy runs from the end of the pole, to a block on the bow, back to the cockpit, in a rope clutch.
An after guy is fixed length. It runs from the toe rail midship near the mast, to the end of the pole. Its length is set so that the pole can't touch the forestay, but is about 3 feet aft of it. when sailing, the pole is much further aft, and the afterguy slack. The pole is in use, the afterguy isn't really needed, as the jib sheet takes the load. There are two afterguys, one each side of the boat.
Topping lift goes from the end of the pole, up and back down to the mast.
I have a sail tie attached to the string to open the jaw on the end of the pole, so I can open it quickly from anywhere on the fore deck.
It's the fixed afterguy that makes this so magic. Having an afterguy on a winch was too many controls to deal with while singlehanded and tied up a winch. To setup, either before I leave the dock, or while sailing on a reach on the opposite tack of where the pole will be, I rig the above lines. I put the lazy sheet in the jaw, and raise the pole into position. I trim the foreguy, so the pole isn't moving, and is 3' aft of the forestay.
So, at this point, I am in the cockpit, sailing on a reach, with the pole on the other side. I furl the jib. Then Jibe, then release the clutch on the fore guy, and unfurl the sail. Easy peasy.
At anytime, I can just furl the sail, and after it's furled trim the fore guy to hold the pole. I can then, if I wish, unfurl it again on either side.
To jibe the pole, I furl the jib. Then, I release the topping lift. The end of the pole drops to the foredeck near the bow. I swap to the other afterguy and other sheet. Then, back to the cockpit jibe the boat, and unfurl on the other side.