Within the same major version you can keep settings and it should all work. Using attended sysupgrade will also automatically reinstall your additional packages. If you use the pre-built sysupgrade file to upgrade, the configuration files for the additional packages will be saved, but you will need to manually reinstall the packages themselves.
Of course it is always a good idea to make a backup of the configuration and save it on your PC. The backup file is a tar archive which you can open to see the text config files inside if there are problems.