This is a little off topic from the OPs question, but another trick I use is park my horse outside the dungeon and pile my loot there. Then when I am ready to fast travel, I grab all my stuff and hop on the horse. Even though you cannot fast travel when
you are overencumbered, apparently your horse can. I used this trick when moving out of Breezehome. I parked the horse on the back porch, loading my 8000-9000 pounds of stuff and shuffled back to my horse where I could fast travel again. :-) Whirlwind
sprint also comes in handy for these situations...
Wouldn't simple enchantments like Fortify Carry Weight be part of the 'random generic enchanted loot' counter in chests and merchant inventories? Obviously excluding unique/ set items and artifacts.
If so then most places only have a 15 percent chance of containing this kind of loot, but since weapons can't have this enchantment at all and only gloves and boots ever normally contain it this should give roughly 2-3% chance of enchanted gloves/ boots
spawning. Much lower for any specific enchantment.