The NON time crunched cyclist thread

I will be one of the non time crunched cyclists for a while now. I have been training for three weeks since I had a two weeks off the bike, including having a cold for a week. Right now I am just trying to get back into riding so I do a lot of junk at the moment. I have moved back to the high mountains so I am adjusting to the altitude and environment.
My plan is to do base training all of December, at least. I prefer 4-5 hours outdoors steady in zone 2. Where I live now it’s not so easy: the roads are few and it’s so hilly. So my question is how should I ride my long endurance rides? Tempo up the mountains? I have a smart trainer so I will try to do longer steady zone 2 rides if I can handle it mentally.