Hi Gav,
have a look at pinetrees leisure in skegness.
Site has all the usual, EHU,toilet/shower blocks,pot washing etc.
If your Mrs prefers a bath as opposed to a shower, there is a bath in the ladies block.
There is a club house on site,also a kiddies playground,during the evening the landlord inflates the bouncy slide for the kiddies (small charge).
There is a bus stop outside the main enterance,this will take you into skegness etc.
www.pinetreesholidays.co.uk
Tele;01754 762949
Pinetrees leisure,croftbank,skegness is just off the A52 boston road.
Hope this helps.
Laird Al.