I just use a drybag inside a regular nylon type bag but also don't lock my food lockers and hang my bags so rodents don't get them.

The problem with hanging or communally storing an expensive Ursack type bag is that it might not be there in the morning due to human predation.
Sadly, an uber expensive bag that's easy to walk away with is a temptation to some.
If that's not an issue I will leave it to others to recommend a rodent resistant alternative.