The hardest part of doing a triathlon (I feel) is packing for Raceday. There is just so much to carry, and each cog is vital, unlike a marathon where you just throw in a pair of shorts, some gels, wear your shoes on flight and you are set!
Here are my thoughts on navigating your first race, from registration to Raceday morning, until you wear your swimming cap and jump in.
Stuff to think about before you begin packing:
Do your research well, and if it is a wetsuit legal race, practice with it. (How to wear and more importantly how to take off your wetsuit!) If its your first or second race, do rent it (rent here) instead of investing in your own. This way, you can find out which style/brand you prefer. Wetsuits are expensive and they don’t stay well, if not used often. Do carry an extra pair of swim goggles, incase something happens to your main pair, and then you will get frantic! Your cap will be given by the organisers. (in case it tears while you are putting it on- don't panic- just ask a volunteer- they usually have extra caps)
Taking the bike to the race location (flying or even driving in a small car) can be quite a production, carton or bike bag being the question!
A detailed post here: Flying with your bike (including Flight rules, packing your bike and more)