Err, am I alone in using the main-halyard to hold the boom when the sails are not hoisted?
We have a cover over trampoline and aft hulls, and the boom is used to hold the cover 'tight' so snow and water dont pile up on the tramp. Also discourages the ¤#%&*¤ birds from nesting on the tramp. (it's bad enough when they sleep on top of the mast. Birds dont seem to like the Marstrøm '94 section. They surely love the flat top of the IYE '80s section tough).
Our halyard is 3mm spectra, with a 6mm sleeve on the end. Secures to the outhaul on the boom, and taking in the slack with the mainsheet (_not_ tight, to avoid vibrations, just the slack).
The jib halyard is secured to the bridle strop, and that takes care of that.
This way, there is no tangles and no contact between halyard and mast. There might be some vibrations from the main halyard, but not setting it tight seems to take care of that.
When sailing, the jib halyard runs inside the jib luff, så that rope is out of the way. The main halyard is neatly coiled (not really coiled, as that twists the halyard, but more like 'bent' repeatedly) secured tightly with the halyard end, and strapped beneath the trampoline with a bungee (just behind the mainbeam). Easy, no pockets in the trampoline, and we have not had the mainsheet work loose yet..