Hi John
My initial thoughts were
1. Park at Weymes bay, cycle to western Ferry ( 5 miles or so)
Hunters Quay- Head to Strachur, Otter Ferry, Tighnabruich, Colintraive, then a Lap of Rothesay, would be 88 miles or so( three Ferry day out)
or
2.Weymes Bay- Hunters Quay – Ardentinny( tough climb ) back over to Strachur road/Loch Eck, Once at Strachur , main road to Colintraive, then round Rothesay
Just different roads,and wee adventure, just my thoughts, Welcome to listen to routes choices
Aye Weather depending
MIkey