We are planning to do a North Luzon loop. Kakayanin ba ng 3 days (not counting the jumpoff the night before)? I enjoy long drives - meron naman ako 2 friends kapalitan if ever.

Here are my proposed routes:

Manila - Pagudpud - Tuguegarao - Santiago City - Cabanatuan - Manila
Manila - Pagudpud - Tuguegarao - Sagada - Baguio - Manila

What route would be the most scenic?
In those routes, what should I watch for?
Vehicle is only at 1000kms so am not expecting a breakdown (knock on wood!), but what tools should I bring if ever?

Thanks