For everyone but the OP who obviously wants a change, and I don't blame them
FYI on day/night shades:
*be sure heavy duty cord is used not the lighter weight stuff
*the proper tension will make the string last. The shade should go up and down easy enough to not pull hard but tight enough they don't fall down.
*I was told by one RV tech...always use 2 hands to operate them to avoid stressing one side more than the other
OP: our best option:
Mini blinds and other blinds available from retailers are ok but we have an old fashioned idea...curtains! A light weight semi-sheer layer using a tension rod within the valance will give you privacy during the day then a heavier layer will add insulation and privacy at night. If the valance is deep enough 2 tension rods with curtains will fit up there once the shade is removed. The best thing is curtains are much easier to clean than shades of any kind. Even with regular dusting and a yearly washing shades are hard to keep clean. Day night shades grab and hold dust like crazy. Curtains can be taken down to wash them as often as desired.
The only downside to these types of window coverings...you will have to make them yourself of find someone else to do it because the sizes you will need aren't available ready-made.