I sell ski tubes and ski bags at very reasonable prices. SporTube and other essential accessories Transpack
The tubes are really for travel, ie airlines, trains, busses. Tubes protect your gear nmuch better than bags but padded bags do help protect your gear too. to load your skis in a tube they go tip to tail with the bases facing out and bindings held by brake retainers, doing this takes a little practice and I woudln't recommend it in the parking lot of a ski area. Bags are better for carrying gear to/from the ski area.
Also never put wet or snow covered gear in a tube or bag and leave it if you have to remove the gear as soon as opossible and dry thouroughly before rust develops on your edges.