There are various useful websites, many of which have been linked more than once on this website. Here they are in alphabetical order, with links:
The Aberdeen University Library has a wonderful collection of photographs if you want to know what this part of Scotland looked like in the second half of the 19th and early 20th century. You need to search about for 'Mull', 'Oban', Skye, Staffa etc. in the George Washington Wilson and Co. archive
Argyll and the Isles is an informative and attractive website mainly for land-based tourists, but has bags of information and links to lots of things to see and do.
Trove.scot is invaluable. It has images and information for thousands of historic sites in Scotland on their online catalogue of archaeology, buildings and other heritage sites. It is part of Historic Environment Scotland.
The Heritage Paths website has some interesting historic routes which are close enough to an anchorage to be doable walks.
The National Trust for Scotland and Historic Environment Scotland properties near the anchorages are all described on the appropriate pages of this website, but their own websites have more information.
The Oban Times has all the news and gossip.
The Sail Scotland website is excellent — lots of really useful information. But a bit commercial with I suspect at least some text written by people wanting to promote their establishments.
Undiscovered Scotland is a pretty good general site for almost everything of interest.
visitmyharbour.com has a wealth of information, not just about this area but all round the UK — tides, harbours, navigation etc etc.
Walk Highlands is a brilliant website for walks. Mind you, this is more for walkers than boaties but there are plenty of ideas there for a day ashore. Some feel this guide is giving too much away on isolated and lonely places.
Welcome Anchorages is a useful free publication about marinas, pontoons and visitor moorings all round the Scottish and Northern Irish coasts. You can pick it up free at many chandleries, or download it. Notwithstanding the title, there is precious little about proper anchorages, and I imagine the entries are not written by independent authors.
The West Highland Anchorages and Moorings Association (WHAM) represents the interests of west coast boaties on matters affecting anchorages, moorings and other maritime issues. Useful general background information and news.