Which route?
A82 up Loch Lomond, Tarbet, Inveraray to A85? Stop at the Drovers Inn
http://www.thedroversinn.co.uk/ and gasp in awe at the surroundings - inside the bar....After Carindow, stop at the Loch Fyne Oyster Bar
http://www.lochfyne.com/pages/content.asp?Page ID=58 - gifts, oysters, garden centre viwers and good restaurant.
Inverarary
http://www.inveraray-argyll.com/ - shipping museum - OK, actually a ship.... - the Old Jail visitor centre, nice wee town for a coffee;
Take A819 towards Dalmally, stop at the Inverawe Smokeries,
http://www.smokedsalmon.co.uk just before Taynuilt - catch your own tea - rods for hire there - view the smokehouse, buy the smoked trout and loadsof other gifts..
Want a diversion? Turn off the A85 to the Ardanaiseig hotel ath teh head of Loch Awe. - bloomin marvellous place for a meal, stay, rest etc etc
http://www.ardanaiseig.com
Boat trips on Loch Awe too
http://www.loch-awe.com/main.htm , Power Station visitor Centre at the Pass of Brander before Dalmally, or walk the Cruachan Horseshoe above the Loch...slog to get here but brilliant scenery
If you go another route and take the A816 to Lochgilphead and Kilmartin - stop at Dunadd Fort
http://www.undiscoveredscotland.co.uk/kilmarti n/dunadd/index.html north of Bridgend - the original crowning