My first Atlantic yacht delivery was a trip from Connecticut to Bermuda with 7 people and the on to St Thomas with a smaller crew of 4.
On the first leg, one fellow brought five bags of gear including five towels. There was no space to store all this stuff and I wanted to toss a few bags overboard.
Since then I have a lecture I give on footwear to people crewing for me.
I always believe in traveling light
and I do that my limiting myself to two bags. Sailors need foul weather gear --that takes up one bag. It is important to have clothing for wet and cold conditions. Then there is the normal bag of clothes.
Sleeping bags: Unlike everyone else I do not bring a sleeping bag and never do on these trips. This applies to camping also. I prefer blankets, preferably synthetic. If it is cold I bring comforter. I'd rather bundle up in warm clothes and use a blanket. Two days out and into the Gulf Stream, it is shorts and T shirt weather--then a bag gets in the way for a week while a blanket becomes an under pad.
Clothes: I bring mostly quick dry clothes. I bring two LL Bean long sleeve button synthetic sun shirts that dry instantly and a couple of Under Armor type loose fitting short sleeve T shirts and one skin tight long sleeve for swimming in the islands and sun protection. I need to buy some SPF 90 sun pants... Instead i have been relying on sun screen and getting burned. I can wash a shirt in a sink in five minutes and put it on right away while still damp and let it dry on my back. Truthfully, I could get by with only one of those shirts as these are both durable, easy to wash in a sink, and fast drying. I bring two for a change. I am amazed how comfortable the loose fitting Under Armor T shirts are. I bought one on same for $7 and wish I bought more of them The tight fitting long sleeves are great as a base layer but not as insulating. I have a long sleeve zip up UA shirt with a pocket this I am using more and more. Warm rain is not an issue because everything dries fast. I also have one pair of quick dry shorts. And a pair of cotton shorts for dry conditions.
I also bring two pairs of light weight
semi tight fitting synthetic sweat pants which I live in during cold weather. I just bought another thinner grade UA swear pant which get a lot of use. I find that cooler but more comfortabke than the heavier sweat pants. Two is a good number for these as they are harder to wash and it is easier to swap them after a few days. They make it very easy to slide into foul weather bibs or any top layer.
All compress well and doesn't look wrinkled when worn.
While I love cotton, they just get damp and smelly. If I bring these cloths they are mostly reserved for flying home. The just don't seem worthwhile but I still love cotton shorts and jeans and polo shirts.
Footwear: I bring comfy sandals for warm weather and waterproof Henry Llyod boots for cold weather. My HL boots are so comfortable I find that I wear the often. Best $300 I ever spent. I am thinking about buying a new pair and throwing out most of my other unused footwear. Sometimes I bring Crocs as they protect toes on deck and have enough flotation that I don't want to take them off to swim. I can't walk far in them though.
Socks: My heavy Seal Skin socks never stink really bad. I only had one pair while sailing off the coast of England for a week at a time. They were comfortable, and tough enough to wear by themselves with boots. They seemed to wick moisture away from my feet...I think that is why they never got very ripe. I washed them once a week-sounds gross, but they were miracle socks. I honestly think anyone could get by with only one pair of these socks. I bought two more pair for $90 and mistakenly got the taller waterproof ones. They were too hard to get on and off. The shorter normal sock height ones are fantastic. I plan to buy two more pair and start throwing out most of my cotton socks except for a few pair for dress up use. As a bonus they don't wear out. After three years of heavy use they no longer look new. I think they will last another five years.
Basically I am convinced that quick dry clothes and synthetics are the only sensible choices if it is wet or sweaty, when camping, traveling, biking, or anything active.
I use Patagonia Gore Tex outer-wear. Mine are no longer made but there is plenty to chose from. The sailors gear is the best quality I've found being design for repeated salt water exposure. The salt crystals are damaging to conventional Gore-Tex, so ocean rated material hold up better than common Gore-Tex.
By using these quick dry cloths I have bee able to travel lighter and remain independent of washing machines and dryers.