Here's a useful hint: when going away it's useful to make a list of things that you need to take. Draw up the list over several days so you wont forget things. Then pack the items and tick them off the list. Easy, peasy lemon squeezy.
Here's a more useful hint: when ticking off that you have packed the antenna, do not tick it off the list then wander off for a cup of tea without packing it!
Only because I decided to throw the 12m GP in as well (weighs under 100g) did I notice I didn't actually have any antennas with me.