Hi everyone

Today me and my friends discovered a place near me that has a large population of eastern garters and dekay's brown snakes. I'm really interested in the brown snakes and am trying to get some good info on them. I especially want to know what is recommended for the tank setup. Do I need to heat it? I already know their diet of worms and slugs, and both food sources are abundant around here.
All the snakes we caught today, of which there were about 20-30, were very healthy looking and chubby. I'm gonna try to find a nice larger dekay's so that i won't have trouble with finding small food items.

Any advice would be great
Thank you