Found these caravan holiday offers for March and April, including Easter.
Prices start from £69 for family of 4.

Park Holidays UK Spring Saver deal -

£40 off a 7 night break or £20 off a 3 or 4 night short break

Offer valid at Dawlish Sands, Golden Sands, Landscove, Riviera Bay, Waterside, Sandhills, New Beach, Seawick, St Osyth Beach, and Felixstowe Beach.

(Excludes Easter 3rd to 19th April)

Easter Offers -

£30 off Devon Easter Weekend Breaks
Offer valid for Easter weekend: Friday 10th Sunday 12th April for stays at Riviera Bay, Dawlish Sands, Golden Sands, Landscove, and Waterside Holiday Parks

Sussex and Suffolk Easters Offers - £20 off 3/4 night and £30 off 7 night Easter Breaks
Offer valid between Friday 3rd Sunday 19th April for stays at Frenchmans Beach and Winchelsea Sands (East Sussex), and Felixstowe Beach (Suffolk).

Ts&Cs - Minimum price £69 for 3 /4 night short break, £120 for 7 night holiday

www.parkholidaysuk.com