Staying one night for a conference, just looking for a safe, reasonably priced place in Deepcut for 14 July... ?
Here is a website that you could use to find a place to stay. http://www.bedandbreakfasts.co.uk
You don't have to worry about being "safe", any place you decide to stay at would be safe.
I use http://www.smoothhound.co.uk/ to find a B&B. We have always had good luck finding a place to stay using them. In fact, I just found a B&B in Bourton-On-The-Water for our trip next month.