If see fisherman on a river I'll always try and portage or go round them. There has been far more animosity from fisherman to paddlers then the other way round...we've spent many many years trying to things properly and negotiate access and got no where, so it's not surprising that many of us thinking fuck this and doing our own thing.
The thing is we've no problem with other water users, it's others who selfishly want to keep it for themselves at the exclusion of others.
Well, generally, I don't have a problem with canoeists - it was the "Fuck it/them, I'm going to do it anyway" attitude that seemed to come across in the opening post that got my back up.
For myself, I'm all for a live and let live attitude - and I tend to agree that there's probably more animosity from anglers to canoeists than the other way round. So far as I can work out, objections appear to have two main thrusts;
1. We have to pay to fish - both for the rod licence (south of the border, at least) and for the permit to whoever owns the fishing rights to that particular bit of water - so why do canoeists gets to use the river for free? Bollocks, in my view and an attitude that I despise - things are shit for me so I want them to be shit for everyone else, basically.
2. I disturbs the fish. No it doesn't - at least not in moderation. I've fished on the Wye when canoeists were coming through the beat and although it did put the fish down, they were happily rising again 5 minutes later, so no big deal really. But there can be a problem where the river isn't wide enough for canoeists to give anglers a wide birth (I'm talking about fly fishers really, here, who are inevitably going to be wading in the river) and where at the same time there's a more or less constant stream of canoe traffic. And that can happen on some stretches of the Wye at weekends.*
I hold no brief for landlowners/riprarian owners - a lot of them are intent at denying access to anglers as they are to canoeists, or if they do allow access then charge extortionately.
I am not sure where precisely in Wales you are talking about having a problem negotiating access? But both the Wye and the Usk do have agreements that allow canoe access -
see here - and if this was stuck to, there shouldn't be a problem. But there is often a problem with some canoeists/rafters not sticking to the agreement.