..Okay, since Vickie is traveling, I'll take a stab at this. "OFFICIAL" time is Monday, September 13, 2010 for four (4) nights.
Here is a link to Petit Jean's reservation page, which includes a phone number to request a specific site (see map above)...
https://www.accessarkansasparks.com/servlet/WebresResDesk?6041
Here's a link to a detailed campground map (pdf file):
http://www.petitjeanstatepark.com/accommodations/pjcampmap.pdf
And here is the only reference I could find regarding a cancellation policy. I'll call them later on today and find out for sure. Campsite ReservationsCampsites can be reserved by visiting or phoning the park visitor center during business hours or online from this Web site. Reservations can be made up to 12 months in advance of the scheduled arrival date.
Single night reservations can be made for any night Sunday through Thursday. Weekend reservations will be taken for a minimum of two or three nights depending on the site. A three or four night minimum will be required when a holiday causes a three-day weekend, such as Memorial Day, July 4th or Labor Day. No refund will be made for early departure on a two or three day reservation or a three or four day holiday weekend reservation.
Payment of a non-refundable reservation fee of one night's full basic camping fee will be required by credit card or debit card at the time campsite reservations is made by phone. A personal check will be accepted only when the reservation is made in person. Guaranteed reservations will be held until 10:00 a.m. on the day following the scheduled arrival date.
Rent-A-Camp: [Bull Shoals-White River or Lake Catherine] $40/day — deposit $40; [Petit Jean] $50/day — deposit $50
Rent-An-RV: Bull Shoals-White River $80/day, Lake Charles or Millwood $70/day; Cane Creek State Park $70/day (A 29-ft. trailer with heat & air-conditioning, private bath with shower, deck with gas grill, refrigerator, microwave, stove, and television. Cooking and eating utensils are included. Linens are not furnished. The RV is permanently set up at a park campsite offering c/w/s hookups.) [Sleeps up to eight persons.]
Rent-A-Yurt [DeGray Lake Resort State Park]: $50/day (a large round, high-walled tent with electricity, wood floors, screened windows, and a door that can be locked. Equipped with cots, a lantern, stove, and ice chest. Linens are not furnished.) Deposit: $50 [Sleeps up to six persons]
Rent-A-Tepee: [Petit Jean] $50/day (incl. equip. & canoe) [Sleeps up to six persons] Deposit: $50