Adult only sites & number of dogs

Hello all

I am a new member and was wondering if there is any way to filter for adult only sites?  Or if anyone can recommend a adult only site in Cumbria I would appreciate it. Also I can not find any restrictions of how may dogs are allowed on sites.  Only that dogs are allowed on all sites.  I have three and some sites that are not club sites will state that 2 is max.  Would hate to book only to be told that having three might be a problem.

Thanks