Well, the big girl fits, barely.
We stayed at St. Bernard State Park for about 5 days seeing folk in NOLA and riding out the leftover Hurricane Patricia system.
We stayed in site 46 and as you see it JUST fits after I removed the Roadmaster hitch from the rear.
50 Amp power and water but no sewer anywhere in the park, I trundled the waste water to the dump station, about 80 yards away on a paved road.
Sites are big, plenty of room between them and are paved but narrow; but we did fit.
Not all sites will fit a 40 foot coach, ours was one of a couple that would do 45. Probably room for six or eight 40s in the park.
We parked our truck and trailer (we caravan at this point) in a nearby spot that is reserved for such overflow.
We are about 15 miles from the French Quarter. I suggest coming in and out on LA 39 from I-10, there is an extremely narrow bridge on LA 47 that will give you great pause. LA 47 is the better road but LA 39 will get you here in one piece. The roads parallel each other so I would come in on 39 until over the river and then cut over to 47. Paris Street is a nice wide connector. Use Google maps.
We paid $18 a night here. My DW says never again because of the bugs; there are mosquitoes but not horrendous (unless it is raining) and if you aren't going to be here much anyway...but NOLA is not her kind of place anyway. We enjoyed the French Quarter, but my sweetie is a non-drinker so it got old for her fast.
Me, I enjoyed the relaxed container policy and toured with an open container with my daughter's boyfriend. Made for a pretty mellow tour...