I have fallen to my own hubris

I have made the choice to min-max in WoW: Forever, something which I am starting to regret, because oh no, my hubris. See, Blizzard will be raising the level cap sometime soon to 30, and I decided I'd complete a bunch of quests, but not turn them in. But I'd forgotten that a lot of Vanilla-era quests involve picking up quest items. And I only have 8-slot bags. Help me.