Lisbon - be careful when choosing the coloured routes with the HOHO bus because our route once took us all round the city and close to the airport before we got to the stops we were interested in! Our mistake, but still quite pleasant.
St Peter Port - we have always managed to make it, but as noted above, the excursions get priority on the tenders. I was very glad on one occasion that we had a morning excursion as it took some passengers a long time to disembark.