well i sure hope u enjoy your holiday, coz fishing up in the Caithness shoreline is great. Go to www.caithness.org/fishing this will give you most of the information and contact details u need.
There are plenty of marks to explore, with good bags of fish to be taken. wick and thurso are notoriousley windy places which can make certain marks hazardous, so check the weather and relocate, for there are plenty areas to explore.
i will email you a list of the tidal predictions from tide plotter for the period 10-18 jul at wick and thurso (scrabster).
hope u have a great time
ps. any problems with the predictions or further questions, dont hesitate to get back to me.