Guimaraes Braga Public Transportation in 1 Day?
 

I see that there are group tours that combine Guimaraes and Braga in one day trip from Porto.
Without being museum tourists do you think it would be feasible to do both from Porto with earliest start possible?

Possible but I did day trips from Porto to each on separate days and was there most of day. About every 3 hours trains go between the two in just over an hour so you have to plan carefully as they are not that frequent. Check www.bahn.de/en for easy to reference schedules.

I did not go to any museums that I recall in either and I guess if you start early you could see both towns - related TA post:

https://www.lonelyplanet.com/portuga...0MINHO/1314926