I prefer them sort of coins to live bullets but they are getting rather boring

I go detecting on a local farmers field that's got a owd footpath running through it.
I'd love to find Roman or medieval treasure but securing permission for them sort of sites (ribchester etc) is difficult due to detecting clubs and rallies paying landowners to keep the lone detectorists away.
The only other thing woud be to go "nighthawking" but im not prepared to do that.
Where did you go when you engaged in the hobby and did you ever find anything of value?