Today Calmac released an update on how bookings will now be open on a 4 week rolling window, instead of 2 weeks, from 9am tomorrow. CalMac also announced details of how 1m physical distancing will allow more capacity on their ferries.
Full details can be found on CalMac’s website: https://www.calmac.co.uk/covid19/calmac-latest-update-09-july-2020
Along with that they have produced guidance about ferry travel: https://www.calmac.co.uk/covid19/faqs/what-can-you-do