Do you know if
Varroa is established in the region of Argyll you are moving the bees to? The most recently available maps show some of Argyll may be uninfested. If the mite isn't already there then don't inflict your
Varroa on the locals who may be working hard to try and keep their stocks clean.
If you're not sure, ask a Q on the
Scottish Beekeepers Association forum. They're a friendly bunch and will try and help.
For starters perhaps try the
Kintyre and Mid-Argyll BKA, or perhaps Oban and District (via the
contacts on this page).
You may have worked this out all already, in which case I'll thank you on behalf of my friends who are struggling to keep
Varroa out of their apiaries.
And finally, if you have to move them now I'd not risk doing so without travel screens ... and a very good substitute is a square of insect-proof netting (see eBay perhaps) clamped over the top of the hive with an eke and the ratchet straps. No need for an additional thing to store unnecessarily. I moved lots of colonies to a
Varroa-riddled part of Scotland like this in a Transit earlier this year.
Drive safely ...