paper towels are not a great substrate, they can easily stick to damp prey items and be ingested as well. My vet has done 3 operations to remove paper towels from snakes insides and only one survived. Just a word of caution.
Tubs are certainly not the only option, they are one of many methods and like all others have pros and cons. The biggest issue is they are a very poor option for normal room temps, they simply do not hold heat well at all. I find it bothersome that someone will trade in a tank to fix humidity issues and end up with much more serious heating issues.