Unfortunately, there is no point whatsoever in applying to CA state MD schools concurrently with SMP attendance. Save your money. I'm basing this statement on having read all 3800 posts in the Yahoo Gtown SMP group, where since 1999 the program director has been sharing anecdotal info on how CA residents get absolutely nowhere until the year AFTER doing the SMP. (If you read through this forum's SMP threads, you'll see this backed up again and again.) Gtown is the best known, most aggressively supportive SMP, but UCs give NO love. Tufts is an unknown, with no published stats, and according to the Tufts MBS threads, a rotten concurrent app record in its first two years.
So to balance this with some encouragement, I want you to know that NOT going to med school in a hurry means you're not squandering your glorious 20's in lecture and study halls. You could have some actual MEMORIES of your fabulous youth. You could avoid the pain of slamming through med school and finding out at age 32 with gray hair and crow's feet and $600k debt that medicine is NOT what makes you happy. In your shoes, I'd be looking at a Peace Corps gig, backpacking through Europe, biking through Vietnam, moving to New Orleans to work on recovery projects, and aiming for med school by age 28 or so (assuming you're, what, 22?).
So. If you can raise your undergrad GPAs by at least .2 apiece by taking another year of undergrad coursework, that's by FAR the best use of your time and money right now - much more valuable than an SMP, imho. If you spreadsheet it out, you can see what's possible. Even after killing an SMP, I would not apply to a UC with a sub-3.0 science GPA (unless I'm a disabled URM with first authorship, in which case I'd try for UCSF).
After that >= .2 improvement, then you're ready to go after a good SMP, and after the SMP, you're ready to apply to a CA MD school. I would pick an SMP that gets students into UCs. If Tufts can demonstrate that they've done this, great, otherwise get into Gtown or Cincinnati or another SMP that publishes its alumni record.
To save Perrotfish some time, his/her opinion contrasts with mine, in that his/her view is that doing an SMP negates the necessity to work on an undergrad GPA, within reason. I'm not sure he/she would bless a sub-3.0 science GPA, though.
Lastly, in your shoes, again, I'd slow it down, go live it up, change your state of residence, and make sure you can remember your 20's.
Best of luck to you.