The larger the fish the better the chance it survives. 5 inch fish would give you a good chance of survival. My guess is a 50% chance. With 2 inch fish my guess is < 3 % survival. A Walmart seine net set out for 24 hours will help a lot. Put them in the thickest cover you have and it would be best to do it in several locations. FWIW 100 5 inch fish at $1.00 is much better than 1000 2 inch fish at 50 cents.