I am a solo traveler wanting to do a day trip to the Douro valley in September. Looking at the usual tours which include a couple of wineries, lunch and a boat trip. Departing and returning to Porto. I prefer a mini-van experience over a large group of 16 or more.
I've heard good things about Cooltours Oporto though the price is rather high, around $167. Get your Guide, Viator and Airbnb Experiences also offer versions of this tour for less but wondering if these will be done in larger buses.
Appreciate experience from others who have done this day trip from Porto. Thanks!