So you don't want to camp?
Here are some alternatives:

Seckford Hall, 4-star @ around £122 per night
Address: Great Bealings, Woodbridge IP13 6NU
Phone:01394 385678

Kesgrave Hall, 4-star @ around £100 per night
Address: Hall Rd, Kesgrave, Ipswich IP5 2PU
Phone:01473 333741

The Crown and Castle, 3-star @ around £215
per night (includes dinner)
Address: Orford Woodbridge, Suffolk IP12 2LJ
Phone:01394 450205

The Crown Hotel, 3-star @ around £100
per night
Address: Market Hill, Framlingham, Woodbridge IP13 9AN
Phone:01728 723521

Ufford Park Hotel, 3-star @ around £71
per night
Address: Ufford Park Woodbridge Hotel, Golf and Spa, Yarmouth Rd, Woodbridge, Suffolk IP12 1QW
Phone:01394 383555