We have been there twice in 2011 and 2012 and stayed a week both times in Wolf Campground. The sites range in size and privacy as in any park. The beaches although at quite a distance from the sites are quite nice and vary in style. All have nice sand but the busier one is very rocky in the water. Most kids like them for climbing and playing on. The other beaches at even more of distance are more sandy as you dip your feet.
There a lot of bike trails throughout but the parks lacks a vistor centre. They do have lots of programs including a soapstone carving class that is very popular.
Firewood can be purchased just outside the park ont he first main road at a better price and quality that the ON Parks wood.
Awenda is about 20 minutes from Penetanguishine which has most ameneties. We visited Discovery Cove there in '11 which is based on a colonial harbour and is worth seeing. Add another 10 for the city of Midland which has even more tourist attactions (Martyr Shrine, Ste Marie Amongst the Hurons, etc). Collingwood is about 1.25 hours away as well.
Overall a great park to stay at with many options within it and its surroundings.
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