Hi again ..yes there are various sites ..I use Easytide as my preferred site. It only gives the current 7 days ..so look it up again when you go
Show Prediction (free) - Corran 07/05/2021 for 7 days - EasyTide
Remember and add 1 hour for BST
The tide will still go in and out at Bunree Caravan site and at the same time as the Corran Narrows and under the Ballachulish bridge. However it wont have the same speed/force. Possibly only one knot off the campsite. Nothing to do with tide but beware the water is shallow for a long way out off the campsite.
To understand why.. you have to imagine there is a lot of water emptying out Loch Leven through the tight restriction under the bridge (Or going into it when the tide is on the flood) ..so it flows a lot faster in the narrow restriction under the bridge than it does in wider parts of the loch. Example it flows at a speed of around 5 or 6 knots under the bridge. (The Corran narrows are stronger and possibly around 6-8 knots)
There is a formula to work out top speed of a displacement boat which is Speed in knots =1.35 x (square root of water length in feet) . Therefore your boat will do approx 4 knots top speed ..so you can now understand why you cant go through when the tide is flowing against you.
(I presume you wont plane your SIB with a 6HP and three people so its displacement speed only.)
However there is nothing stopping you driving to Loch Leven and launching your boat from the Glencoe boat club.. If you ask and pay a small donation..they do allow it. Or launch from a layby. Same with Loch Linnhe , there is a large parking area north of the Corran Narrows and you can launch from it and go to Fort William safely from there..assuming good weather.
The "Bay" is anywhere away from the Corran Narrows and under the Ballachulish Bridge
Hope that helps