Years ago we went to the US and the exchange rate was really good so I bought lots of new clothes when there. Then a couple of years later we went to Canada, so I thought that for the first time ever I wouldn't take much with me as I would purchase when on holiday. Well, it was a coach tour of the Canadian Rockies (my bucket-list since a child) BUT we were on the go from early morning to late evening with barely any shopping opportunities and any shops we did stop at had usually just tourist items (tee-shirts with bears or maple leaves on). Instead of relaxing in the evenings I had to find the laundry facilities. Apart from that the holiday was amazing. Packing for a cruise holiday freaks me out as I never know what to take for evening wear.
Have you stopped buying papers?
Retiring and living frugally in money from downsizing after years of stress
down himself Blinko 

You can buy travel detergent in quite small bottles so it won't take up a lot of space. Instead of packing lots of different clothes think about using costume jewellery and scarves to ring the changes, you can pick up some cheap and cheerful necklaces/earrings etc from most Poundshops. Hope you enjoy your holiday!