Recently, I considered not spending skill points on Disable Device nor Open Locks.
Doors can usually be bashed down, or Knocked (by the Wizard) if they are really important.
Even then, is a door is meant as not to be passed you can do nothing.
If the door is a mere obstacle you will overcome it whether you have open locks or not.
Disable Device is not very useful since traps are lame.
No single trap can kill you.
So why spend points in these two skills?
Also, Halfling is a very good option for this class.
Adn for the Bard multiclassing, I've seen it working
(Bard 1, Rog 2) and it works great.
You rogue get's to use Wand of CLW, and other nifty scrolls and wands.
Plus you Inspire Courage song. Not too bad for 1/2 1d6 Sneak Damage
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Also, your skills are practically not affected by the multiclassing.