Hello James,
thats a very good line of springer you have there, the Rytex line. All my springers have been Rytex and have been first class, however if you want to use the dog in the hide then you must get him/her to sit and stay for long periods while he/she is still young because they don`t like it at all. Try getting a net set up on the lawn and sit in it with the dog for an hour to get him/her use to it, but do it every day for a week, or two even until they sit quiet. It will be difficult but dont give up ,they are very, very intelligent dogs, I love them.
Good luck.