Possums are wee holy men and I will not speak ill of them.
Possums eat ticks, which is great.
Also, they don’t play tricks on you. If you encounter one, you’ll be grimaced or played-dead at, but that’s all. They don’t come into your tent at night to mess with you.
And they’re very sweet to hold! Just don’t startle them, the claws are sharp and they’ll try to run up your arm with said claws.