Catchment system for leaks at plumbing joints?

gbopp wrote:
Do you worry about possible leaks at your S&B when you are in the RV?

Last summer DW and I were shopping in a Walmart five hours from home because we forgot to pack the lawn chairs, when our house sitter calls with the news that a pipe has broken and water is streaming down the basement wall. Lucky for me my BIL is handy and lives a half hour away, and was able to repair the leak with parts on hand.