There are a few options if you are looking to stay at the venue, or nearby.

For the night of the wedding (2nd August) there are some onsite options available, which include:
4 x glamping pods (sleeps 4)
3 x Shephards huts (sleeps 4)
3 x sheds (sleeps 2)

These can all be found at the link here:

There are also AirBnBs available locally, all within a 10 minute drive.

Alternatively, there will be plenty of hotels and AirBnBs to choose from in the nearest big towns to the venue, which are:

Chippenham - 20 minute drive
Devizes - 15 minute drive