Many of us will travel to San Diego in a week for Experimental Biology. You have spent time registering, picking a hotel, making travel arrangements, and considering sessions. Now it is time to consider your packing.
San Diego makes it easier; most of the year the temperature runs about 70 and the sun usually shines. Could we get rain? Sure, but really bad weather is not a strong possibility. You should have a fold-able pocket umbrella in your suitcase anyway. Check the weather forecast right before you finish packing; they don't get particularly predictive until the 5-day time-frame.
Conference travel involves at least 3 types of activities. These include travel, attendance, and presentation. With a bit of planning, you can get appropriate apparel for a 5-day trip into a case that fits in the overhead compartment of an airplane. What do you sacrifice? Shoes. If you need more than 2 pair (one to wear on the plane and one to ride in the case) it's unlikely that you will get by with just the roll-aboard.
On travel days, comfort may be the primary consideration; however, you should also consider what happens if checked luggage does not immediately make it to your final destination. Having a clean set of underwear and all personal necessities available can make that delay tolerable. Also consider wearing something you could wear to a session; nice jeans with a shirt and jacket can work for almost any meeting session and can be just as comfortable as sweats. OK, not sweats, but you know what I mean. Also, wearing a jacket avoids taking up valuable suitcase room. Nice slip-on shoes also work well. You want something that won't slow you down too much when you hurry for a connection, but not something so complicated it will take you half-an-hour to redress in security. The people behind you in line will be more of a threat if you wear above-the-knee lace-up boots (trust me, I have seen this happen) than any terrorist.
The rest of the meeting you have two things to avoid: looking sloppy or slutty. You are meeting potential colleagues and reviewers; if I receive your next manuscript, do you really want me to remember the girl with the dragon tattoo or your unusual navel piercing? When you present, a suit-like ensemble is ideal, especially if you are young or female. Like it or not, dressing professionally will make you seem more authoritative. Pissed that people may judge you by your clothing? It happens whether you like it or not.
Finally, remember all the chargers for your gizmos and never let anyone check your presentation. Posters should only enter the luggage compartment if pried from your cold, dead fingers.
This advice has been compiled into a brief slideshow below. Enjoy, and may you and your luggage always arrive together. See you in San Diego!