Hi, for VHS do you mean things like long play or EP? What do you mean by low resolution miniDV tapes? I am not aware of a low-res format for DV.
Anyhow, assuming that you mean things like LP and EP for VHS - I would use the same settings as for regular VHS or BetaSP or any tape format where you can't migrate the signal with the same format as the source (like DV) - Uncompressed or Lossless video (I like FFV1 if you want to save some space over uncompressed) using 720x576 for PAL (720x486 for NTSC) with PCM audio.
If a source tape has a weak signal, you should do your very best to capture as much of the data as possible, rather than damaging it even further by using lossy compression or lower resolution.