I was there last year, and would go again in a heartbeat. Fabulous views. Unfortunately they are typically not too easy, at least the ones I did,and would take a while to do. Torbina was quite close to our accomodation, but was a tough climb, 2-3 hours climbing. Coriscao was maybe the easiest, but was still a 2 hr climb. Porra de Enol was pretty straight forward too. Get the bus up from Covadonga.
We drove past Pica de Ten but didn’t activate it. It looks pretty straight forward.
A camper van is a good way to get around, lots of free parking in car parks etc. No need to pay for campsites if you’re happy to rough it a bit. And note that the cafe’s / restaurants don’t open til 7 or 8. Not great if you’ve been out all day. We went in October and the temp was in the 20’s. It’s a dry heat, so was pretty comfortable.
Addendum: And the missus reminded me, once outside of the main cities food is local cuisine. No takeaways etc. Restaurants are a gamble - no dishes are standard “meat and two veg”. It’s not that the food is bad, but you may not get what you expect. Best to arrive and have a look at what people are eating and order it if you like the look of it. You may need to go through several courses to complete a meal. Also, some dishes are meant for two, so they will only bring out one dish and wait til this is gone to bring the other. We got caught a few times with this, waiting for the other dish before starting to eat. This isn’t a problem, but just be prepared. And also note that on the mountains there are lots of cows roaming freely. They are chill and can be ignored. A lot of them wear bells, so the mountains are not exactly quiet 