I use R. rugosa for marmalades and rose hip jelly. It has more 'flesh' than other roses I grow, which makes it easier to pick and clean enough hips to make it worth your while. Be sure you remove _all_ seeds before processing as they are extremely prickly and nasty if ingested. The trick to cleaning them without turning everything into mush is to pick the hips just _before_ they are fully ripe and turn soft, then cut them horisontally and remove the seeds with the back end of a tea spoon - I learned this from my grandmother who cleaned loads of rose hips in her lifetime and I highly recommend the method.
Also remember that R. rugosa can be invasive, especially in sandy soil. There are named varieties which are not invasive, but not all of them have good hips, so it's wise to do a little research before making your choice(s).