Question

I was camping in Tionesta County, Pa over the weekend and while I was on a hikeI stumbled across a pond and started fishing in it. I caught a catfish and one of its fins went through my boot and into my foot which I had to go to the hospital for. Shortly after catching the fish and removing it from my foot, the apparent landowner came out of no where and said I couldn;t be there so I started to leave. While leaving he said I was required by law to give him my information so I did and now i'm getting phone calls from the state police saying he's pressing tresspassing charges. There were no signs, fences, or anything of that sort from the location I entered his property but when he walked me off his property he took me another direction and there was one there but can I be charged for tresspassing when the signs were not all around and not really visisble without searching for them? And since the landowner is giving me a hard time can I sue him for the damages caused by his catfish?