Usually it is fine to just store it in the RV. Bears haven't really connected that big metal box on wheels to food, so they don't think to try to get inside (unlike some areas where cars have been identified with food, so they try to get in to search).
Once you get to the campground, you can check the bulletin board (or with the ranger station) to see if there are any updated instructions. Sometimes in any given period, a park will have a more inquisitive/aggressive bear community and will establish extra rules until it has been controlled. If not, then use your RV like the bear box and use standard anti-bear habits:
1. Keep food put away; don't leave food where it can be seen from outside the RV
2. Throw away your garbage into the park's big garbage bins each day to minimize the smell in and around the RV
3. Don't leave coolers out in plain sight - bears recognize coolers as "food containers", so even if they don't smell anything, they will often tear apart the cooler to see if there is something inside
4. Don't drop/toss food on the ground and leave it - no throwing apple cores into the brush, if you drop some chips, pick them up, if you spill a drink, clean it up