Here's the best advice I ever got about packing. Changed the way I pack and travel forever, and I will never go back. I sold all my garment bags.
You can pack suits in a carry-on bag. Seriously, you can. I learned this from a travel website. It's been awhile so I don't remember which one, but it was probably either through Fodors.com or Cruisecritic.com. For pants, you lay them flat (seams to seams, like you're going to hang them on a hangar) and roll them from the hems up to the waistband. For suitcoats, you pull the arms inward and roll from the hem up toward the collar. Blouses the same way. Skirts, hem to waistband. I packed suits for hubby and 2 sons for our cruise 3 years ago in wheeled carry-ons and they came out great! If I can find the link, I'll post it here. Seriously, since I learned this, I have never gone anywhere with more luggage than a wheeled carry-on and a large purse or a school-sized backpack per person, and that includes 23 days in Europe (though we did stay the middle week in an apartment with a washer-dryer). A two or three-day trip for an interview should be a snap.