Yeh have had a couple of small day trips in an open boat with a mate who had one...found it a great experience....would love to own one & probably will before too long as my older daughter is very keen on the outdoors....we use the sea boats mostly on west coast sea lochs & inland lochs as well...I've never done anything too committing like big open crossings (yet). the sea demands respect & it gets mine in full.honestly ..you can just about get the kitchen sink in....If I had an open canoe, I'd probobly try & take my bike!!!
Recently bought the SCA Scottish canoe touring guidebook & was very impressed with all of the routes detailed in it..for example - Mallaig to upper loch Nevis or to the head of loch quoich in winter..right to the foot of big inaccesable mountains!!...these are trips I will do.
In contrast - I have two sea kayaking guidebooks & the trips in them are mostly very serious stuff....club & guided stuff....'Trip one - round the mull of galloway!'...'Trip two - ailsa craig'...hang on..where's my SCA open canoe guide??!! Lovely that'll do nicely.