The QHST* files shouldn’t be much of a problem since they are named in relation to the Julian date and include a sequencing character. They can be restored to QSYS or to any user library. Viewing them, however, may be tricky if they’re not restored to QSYS. The DSPLOG command isn’t going to know anything about them unless they’re in QSYS.
As for QAUDJRN, it’s almost certain that you don’t want to restore the <i>journal.</i> Most likely you actually want to restore a particular range of <i>journal receivers</i>. These can be restored to any library, but it’s also best to restore them to the library you normally create them in. In order to access them, use the DSPJRN RCVRNG() parameter to list explicitly the first and last receiver that you will be searching.
You should restore receivers so that there are no gaps between the first receiver you list and the last one you list. You can have gaps between different groups that you restore and between any group that you restore and receivers that are live in the current receiver chain. You just don’t want to mess with trying to search across a group that has a receiver missing in the middle of your range.