We have stayed at 4J off and on for 12+ years. We have always found the owners very nice and accommodating. Campground is easy walk to town, some sites sit on the river. Clean park, clean restrooms, etc. The owners have done quite a bit to clean this park up and expand it over the years. They do offer discounts for 7+ days stay.
Generally speaking okay park if you are of the "older" generation. Washing of motorhome/vehicle allowed with charge of $10.00. They do not like you to leave ANYTHING out even if you are outside using it. You will be told to put it away. Campsites are tight. If you have slide outs, you will be in your neighbors slide out room. Rates are extremely high for what you get.