Free: Contests & Raffles.
I have caught otter like that as a blind set. Only problem as a land set an otter will eat the trap unless it is a very heavily built one. My old with 1x2 wire may or may not hold an otter like that but the trap will have to be rebuilt for sure.
I would put a swim through on each side of the crossover trail, that way you can catch 2 and have a 72 hr trap check!
I catch as many on land in cages as in water. The trap needs to be checked the next day when trap is not submerged. Make your doors bar doors. They will work the doors and not your cage.As was mentioned earlier, if you have a good central run, use two traps. You catch one alive, others will come if they are near.
I would not worry about that. Never had a problem getting them to spring the trap.