I have shipped a box out every year for the past 6 years without issue. Typically ship at least 2 weeks ground ahead of travel time, mark my box outside with name, arrival date, and in my case the ressie # as it is in my name. We only do carry on and no car (we rely on the WDW bus) so we ship a lot! snacks, lotion, coffee, cereal, shampoo, wipes, micro mac n cheese...... luckly I'm allowed to use my work's shipping rates, never costs me more than $10 for the huge box.