Unhook your water hose and see how good the pressure is without being hooked to your RV or regulator, if the pressure seems good then maybe your inline filter system (if you have one) is clogged and needs the filter replacing. I have also seen a water pressure regulator malfunction and not let enough water pressure thru. As the others have said though if the parks pressure is low there isn't much you can do.
2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000