Perhaps the best answer is to match the value of services provided with the fees charged, a graduated fee schedule similar to this--
Daily Site Fees:
Tent campers (15 amp service): $25/day
Smaller RVs (30 amp): $35/day
Larger RVs (50 amp): $40/day
Sites charging EVs (30 and 50 amp sites only): $100/day
Penalty for charging EVs without approval: $200/day
You see, in the legal world there are 4 basic requirements for most commercial transactions:
1. Offer (signage or other posting of the proprietor's fee schedule).
2. Acceptance (customer accepts proprietor's terms for the goods and services)
3. Delivery (customer parks rig in assigned spot)
4. Consideration (customer pays for the agreed goods and services).
Neither party can force unilateral changes on the other. Customer cannot force the proprietor to charge $10/night for a $25/day site...the proprietor cannot force the customer to pay $100/day for a $25/day site).
This allows customers to shop with their feet. Don't like the fees, then move along.
