A perfect list courtesy of David Owen of Golf Digest:
In the carry-on bag:
- 1 pair dark polyester microfiber pants (another worn on the plane)
- 1 shirt (another worn on the plane—and one or both of these is a turtleneck)
- 1 sweater (worn or packed, depending on the weather)
- 1 pair of Under Armour-type long johns
- 1 long-sleeve Under Armour-type undershirt
- 1 tee shirt (to sleep in and serve in a pinch as an extra layer)
- 1 pair of sweat pants (for lounging around and for emergency duty under rain pants if the weather turns really foul)
- Lots of cotton handkerchiefs (my new favorite golf accessory)
- Toiletry-type crap
- As many pairs of socks and underpants as I can cram into the remaining space
In the golf-bag travel case (along with my golf clubs):
- 1 pair True Linkswear (or similarly comfortable) waterproof golf shoes (a second pair worn instead of packed—no other shoes are needed)
- 1 rain suit (the jacket of which, in combination with a sweater, shirt, and undershirt, should be plenty, even for December)
- 2 regular golf gloves and 2 pairs of rain gloves
- 1 Seattle Sombrero (or other good rain hat)
- 1 regular golf hat
- As many golf balls as I think I’m going to need, because they’re cheaper over here
http://www.myusualgame.com/2013/01/29/how-to-pack-for-a-golf-trip-to-the-british-isles/