is it necessarily a blunt high you crave or would a bowl set ya straight?

bowls are much easier to cover up in a bathroom:

1. bubblebath is the shit!
2. candles are nice
3. only pack as much in bowl as you can take in 1 hit, and take it all so theres no smoke
4. use a spoof.

Also, if you really need a blunt, find someone who smokes and blaze with them in the bathroom. if you pass is back and forth really quickly, there will be less smoke from the blunt just burning.

hope this helps