The sites are big, as mentioned. We were in site 50, plenty big for a big rig. Having never been to a park with this kind of set up, we were a little (ok, a lot) confused as to how to park. They are set in a triangle with each site being a pull through. The sites were level, and grassy. It was what I expected a provincial park to be like. We would stay here again, as long as we didn't need Wi-Fi. We camped here in a Fifth Wheel.
Mill River Provincial Park Total 36 sites unserviced and 2 way and 36 sites 3 way. Site 33. This complex has interpretive programs and evening activities in the summer but after Labor Day is only open for another few weeks as are most PEI parks. Opening and closing dates change every year so one needs to check with the visitor centers or online. We stayed in the 2 way section and since this was Labor Day everyone else left. There were about 10 campers in the three way sections which are set up in the woods in pods. The pods were shaped like triangles with three campsites in each pod. Very unique how it is laid out. The unserviced sites and 2 way sites are in the woods and field. Sites are big! There is a water park and fun park here as well as an 18 hole golf course. Volleyball courts, swimming, canoe/kayaking, marina, racket and tennis courts (extra fees for much of this). Every Provincial Park has a laundromat, pay phone, kitchen shelters, playground and restrooms with showers. This is the only PP in PEI with a campground that is not on the shore even though the river is close. It is the biggest PP in western PEI. This park is right off route 2 which travels through most of PEI in the center of the island. We camped here in a Motorhome.