Yeah, that sounds like it would work well. I'd probably run them in the oven (lowest setting) or dehydrator for 10-15 minutes or so, just to ensure low moisture, unless you live in the high desert.I have found that the jar adapter for vac sealing jars seals them poorly. Some people (not me) buy expensive (about $500+) cabinet style vacuum sealers that pull a very hard vacuum and do an excellent job.
I do have a more inexpensive cabinet sealer that seals with enough vacuum that you need a lid lifter to open the jars rather than just using your thumb. I have not tried oven canning but I'm sure it works fine for items not hurt by the heat (like crackers).
Summerthyme