I think what clothes you carry will also depend what climate you live in. If I'm on the South Coast I may only carry Several T shirts, Several pairs of shorts and a hoodie and call it good to go.
Realize I'm from Vermont and I wear Cargo Shirts, a T shirt and a Hoody most of the year with a pair of Crocs. At night I wear a T shirt and either a light pair of shorts or a pair of lounge pants. You know the I'm going to Walmart Outfit.
That's not to say I dont have a lot of other clothes but that's what I wear. pretty much. I have literally dressers and totes full of clothes. I never wear socks, I have like 2 dozen pair in my dresser.
I have recently gotten ready to do a bike packing trip and perhaps the list I have for that may help. For Van Life the amount of clothes I will carry would just increase but I don't think what I carry will change just that I may carry more of an item.
I will mark items that I added just for Van Life with an * I wouldnt of carried these bike packing.
I will mark items I increased the number I'm carrying of for Van Life with a ^
3 pairs of athletic socks - I wear these with my Velcro Sneakers when I ride my bike
2 Pair of Wool Socks - keep my feet warm at night for the best warmth from socks make sure they are loose fitting
(snap elastic stitching if you need to if they are tight you will have cold feet)
Merino Wool Base Layer Bottoms - for cold weather
Merino Wool Base Layer Top - for cold weather
2 Merino Wool Buffs
1 Wool Glove Liners - Same for gloves as with the socks they need to be loose especially around the wrists
(snap elastic stitches if you need to tight items restrict blood flow and can make your extremities feel extremely cold very quickly)
1 Split Leather Work Gloves - These fit over my Wool Glove Liners
1 Crocheted Wool Beanie/Took/Watch Cap whatever you choose to call it
2 Active wear T shirts
3 Cotton T shirts^
1 Long Sleeve T shirt*
1 Fleece Pullover
1 Hooded Pullover Rain Jacket/ Windbreaker
2 Cotton Hoodies^
1 Swim Trunks
2 Active Wear Shorts - I use these to ride my bike they are nothing fancy just some basket ball shorts or soccer shorts
2 Ripstop Cargo Shorts^
2 Denim Cargo Shorts*
1 Pair of Crocs* - I prefer Crocs over Sandals. The flat sandals can really cause foot issues for me. No issues with the curve of Crocs
1 Pair of Velcro Sneakers - I use these to ride my bike, no laces to get tangled
1 Pair of Trail Runners - These are just light weight sneakers with really awesome tread for traction when hiking
2 Button Down Flannel Shirts^
2 Button Down Camp Shirts*
1 Sun Hat with a wide brim all the way around
OPTIONAL ITEMS* - these would depend on your personality if you go out dancing or what not. Not my style but each there own.
Khakis
Polo
Belt
Sports Coat
Dress Shoes
Dress Socks
If I knew I was going to be in very cold snowy climate I would also bring my Pack Boots and a Heavy Winter Coat. Most likely I would not bring these though. If plans changed I'd have a relative ship them to me.
Majority of my clothes fit in 2-3 32 quart Sterilite containers I can fit under my bed. Some things live in my hiking pack like the Fleece Pullover, Windbreaker, Wool Glove Liners, Split Leather Gloves, Crocheted Wool Cap, 2 Buffs.
Shoes have there own place under a seat. I would hang the Hoody and Flannel Shirt I have in rotation on the back of a seat.
Current bed clothes would be under my pillow on my bed.
I have a very large Towel for Showering that hangs on a bungee from the ceiling.
I have a TO GO! BAG this has wet wipes and hand sanitizer and toilet paper in it, along with Soap, Razor, Toothbrush etc.. The idea is if I'm going to go in to take a shower I can just stuff the towel in the bag and be ready to go do that. Otherwise it's always ready for when Ya Need TO GO! If you know what I mean.