There's a teamwork benefit in (I think) Complete Mage that lets the team rest like an elf. If the team leader is an elf (or half-elf) and the rest of the team meets the requirements, they can get a full night's rest in 4 hours of trancing. The teamwork benefit description specifically says this includes preparing spells.
I know this contradicts other rules, but I'm pretty sure it says this. Unfortunately, I don't have the book handy right now, but maybe somebody can double-check me.
I know this contradicts other rules, but I'm pretty sure it says this. Unfortunately, I don't have the book handy right now, but maybe somebody can double-check me.