I had someone take me.
I would DEFINITELY look into OFF SITE long term parking. There are many close by. On site would cost a small fortune. Good luck. Safe travels.
Check out some of the offsite parking operators for cheapest longterm rates. Even economy at SFB is $13/day.
There is a big parking lot. But not sure if it's for long term call the airport and ask.
Park in the garage
They have a large long term parking lot. As you pull up, follow signs to LT parking.
Thanks! Your answer is awaiting moderation.