Campground prices?

To me, this is like asking what's a good value for a hotel room. There is no answer because it's dependent upon personal preferences.

I have paid $45 a night for a rally. Included hookups and all. I routinely pay $20-25 for forest service campgrounds with pit toilets. Personally, I think the pricing is backwards.

I'm with the last poster. I travel so I don't have to be looking for a place too late in the afternoon. I start looking for RV park signs around 3:30. I use RV Parky app on my phone as it shows prices of nearby RV parks along with services available. Very handy.

What I look for mainly is Wifi. Then 50 amp, then room for the slides, than W&S. In that order. I'm pretty self contained and can go 10 days without dumping or getting water. And I can use 30 amp easily too.

I also scout on the internet the night before travel and hand write short descriptions of RV parks along the way. Including bail out areas or POIs. So if my phone or GPS mapping goes haywire, I still have something.

Many of the parks I stay at are Passport America parks so I pay 1/2 their usual rates but typically, while traveling, $25-$35 is the expected daily rate, and what I look for. Weekly and monthly rates are usually better but not always. If they aren't I move to another park.

You should be aware that I've been seeing many inferior parks raising their rates to 'Resort' prices these days. I'm also seeing big investment companies buying smaller parks, almost doubling their rates, without making anything other than cosmetic improvements. It's getting frustrating that an old park that last year was only $25/nite is now $49/nite with no improvements, or just marginal improvements in services like Wifi. Seeing that a lot as I traveled this past year. I have to hunt for low cost parks a lot more than I use to.

I don't believe there is any formula, criteria or other metric that can be used to determine a price value matrix. There are just too many variables.
Location, services, amenities and time of year all figure in.
Location has dozens of variables within that sub-category. Is it park in an highly desirable and expensive place like Key West, the southern California coast or Jackson, Wyoming? Is it located in a large urban area? Is it conveniently located off a major highway? That's just to name a few.
Same with amenities. Pools, playgrounds, fitness facilities, golf courses, activities all can have varying values. For example, pools can range from a 10x30 postage stamp to full blown waterparks. Golf courses can be a run down mini golf or full blown championship golf course. Activities can be a ten minute hay ride once a day or entire programs for different age groups that run all day.
Services run from a wide spot in the road for dry camping, to the standard full hookup park, to resorts with concrete pads and roads, clubhouses, manicured lawns and outdoor kitchens on each site.
Then you can expect to pay different prices at different times of the year. Shoulder seasons are expected to often be cheaper than prime time. Special events can cause prices to rise. Sometimes, in the deep off season, the only choice is the one open park for miles and you usually pay for that convenience.
Personally, I have felt ripped off paying $10.00 for a night and felt like I hit the lottery paying $150. It just depends.

As long as it is clean and quiet I expect to pay $25-$35/night with hookup for water and power. The most expensive we had was a KOA in California, 67 bucks just for a place to sleep but it was late, we didn't know the area and were too tired to care. Normally we started looking for a suitable place around 4 so as not to get in that situation.

With a federal senior pass and solar system (adequate panels, batteries and controller) your costs will drop and need for plugin electricity evaporate significantly or disappear. Dumps and fresh water are not everywhere but enough are available. I dump and fill at every opportunity. So for my favorite camping areas I’m paying $12.50 per night.