Ditto on calling the park. Also check the pictures on the reservation site of the campsite. Is there an obstructions to the rear of it from the end of the pad? For instance, if it's a paved pad, is there anything 10-15' from the end of the pad? If not, then you may be ok. Normally there's about 10' of camper from the rear wheel to the rear wall of the camper. Measure yours and see. If there are no obstructions (including campsite directly behind your campsite) , then it may work for you. Or the entire site length could be 30' long. You may just need to park your truck in some additional parking. A pain in the butt maybe worth not having to cancel.