you wont smell fuel everywhere

the first time i pulled mine out last spring i left it open and it smelled cuz i also didnt pull any of the engine bay stuff just the canister (i have a '97 and its on the rear passenger side & the vacuum line is hardlined all the way to the engine bay alongside the fuel feed/return lines and rear brake hardline), well my gas gauge started making a noise at cruising speed and i got paranoid and put it back on cuz it didnt seem like it was moving down at all?

i pulled mine off today and capped the line and have removed alot of unnecessary engine bay stuffs anyways, and so far so good.