Yes, you can ask. However most RV rental listings already have good pictures (in some cases videos). If the pictures are not adequate then perhaps that is a minor red flag you should consider before you reserve the RV.
In some cases the RV Owner may have provided the pictures when he/she first listed the RV. If you feel that the pictures are too good to be true i.e RV is 4 years old but pictures show it as brand new then you should definitely request RV owner to update the pictures in the RV listing or to send you recent pictures.
