> Do I need to corral everything in Safari first (somehow) to not get them mixed up? Rita
You shouldn't run into any "mix-up" issues, Rita; the Safari updater will simply "refresh" Safari and leave its ancillary files untouched.
If it will make you more comfortable, though, navigate to /Users/your short name/Library/Safari, select it, and hit command-D to create a duplicate that the updater won't even find, let alone touch.