Starting raining in Portugal today. First rain in months. :/ Think the wet season has just arrived, a bit later than usual but should brighten up soon I think.
O wow you are right up the north there. I am in the far south mate, so could be a good few weeks before you make it down here..
A few places to visit on the way down:
Oporto (Porto)
Fatima
Batalha
Óbidos
There are lots of others, but those are a couple. All have free aires, except Porto. However you can park on the other side of river in a small carpark with a big red billboard... Ull know it when u see it.
Once you get get down here, I can give you lists of places to park and get water etc (for PC/android/iphone) if you would like them. Doesn't require an internet connection.
Parking in Portugal is fine as long as you don't get in the way. You can park (in theory) for up to 13 days in the same place and then you need to move a bit... however if you see campers parked in numbers then assume its ok to park longer if you want to. Also if you see the below sign with either Autocaravana or Caravana below it, then do not park there.. the GNR will fine your ass.

Hit me up when you get to the Algarve itself and a small tip for you... Words are pronounced with emphasis on the penultimate syllable and quite often the last syllable is barely audible... However if there is an accent in the word, then that syllable is emphasised...
Please = Se faz favor ( SUH FASH FAHvor )
Thank you = Obrigado ( O BRIH GAHD o) (Obrigada for ladies)
Yes = Sim ( SEEN )
No = Nao (NOWN)
I want = (Eu) Quero ( EEEo CARE ohh)
I need = (Eu) Preciso (PRUH SEE so)
Diesel = Gasoleo
Have fun

Livin' in me van in Portugal.
'93 Mk4 TD 150L Hitop Custom Camper
100ps Epic blue spot