I think its fine as long as you are not selling them to others. I have kept lots of reptiles and amphibians that I caught growing up, its part of what got me loving herps. My friends and I spent countless hours catching whatever we could find, we setup great habitats for them and when we got tired of them we just let them go. To me it will be a sad day when you cant catch and keep any wild herps, those are great memories of being a kid that i hope my kids can have as well.