At that length, one of the biggest changes from a week long trip was laundry. If you're staying places with washing machines, you still have to take into consideration detergent. You might be able to get small amounts locally, but I ended up only being able to find large bottles of heavily perfumed liquids that were a pain to deal with. Dryers were non-existent or ineffective, so having the time and tools for air drying were also important. Local Laundromats had the detergent built into the cycle, but again it was heavily perfumed. But they were the only place with working dryers. There's always sink laundry in a pinch; this has some recommendations.

Having clothes that you don't have to wash as often helps as well; there's a reason every one bag site recommends merino wool in spite of its price. It picks up odors less which also means you can reduce some of the pieces you'd take just to be able to have clean clothes on any given day.