So I went on a trip, and I put my clothes in SpaceBags to save space. Problem is, there's no vacuum in the hotel for when I'm repacking to go home. I only brought one bag, and there's a one-bag limit. No carry ons. What do I do about it?
Hotels have vacuum cleaners. Ask the maid if their hotel has vacuums with a hose and if you can use it briefly.
Roll them up very tightly. So all the shirts rolled tightly, all the slacks rolled together. etc. A space bag isn't all that necessary this way.
Ask the Hotel's housekeeping staff if they have a vacuum you can borrow Buy another Suitcase and pay the Extra Bag Fee. Stuff as much as you can into the suitcase. if you have someone who can keep sitting on the items and pushing them down. Go to a local shipping store and have them ship any extra items back by something like UPS/FedEx. If you can do without things for a few days, sending it ground may be a cheaper alternative to buying the extra suitcase and paying the extra bag fee. Decide what you no longer want to have and find a local charity to donate the items to. Leave them in the Hotel for them to just take or throw away.