Check mo rin sir 1896 bed and breakfast near sikad road. Its a house converted to a b&b and has safe parking where you can leave your car.
If you want to drive some more, actually some friends told me that even a sedan can go up all the way to rangers station since roads are better now.
And since you are driving alone, i suggest if time permits stay one more night in baguio and leave in the morning since you will be coming from a major climb. Baka makatulog ka while driving pauwi. Kung di naman kaya, damihan mo na lang stop over pababa and doble ingat kasi galing sa pagod na trek tapos drive na agad pagbalik baguio.