Do what I do.
I have a smaller trap that is suitable for both squirrels and chipmunks.
Bait the trap with black oil sunflower seeds.
Not peanut butter, not fruit, etc.
There is no spray repellent that will keep them away.
It’s always the adult squirrels that will eat the tomatoes.
It won’t be long before they discover the green maters are just as tasty as the ripe/near-ripe ones.
Do not get the (Havaheart for example) trap that is suitable for larger critters like possums and squirrels.
I find chipmunks are worse than squirrels at eating my maters.
What you may want to consider is start pulling the maters when they have the slightest pink color on the bloom end.
They will ripen just fine somewhere inside where there is sun light.
Do not leave them outside, they will turn to mush.
That “vine ripened” talk is just nonsense.
Last year, after issues with birds pecking ripe tomatoes & other problems, I started picking them when I could start seeing a “blush” of color on them. I left the tomatoes on the countertop in a single layer and they ripened beautifully, with no loss in flavor. In the fall, with a freeze forecast overnight, I picked everything larger than a golf ball. Even the very green tomatoes eventually ripened - I had ripe tomatoes into early December.
As for squirrels .... this year I can foresee a problem. We thinned out the squirrel population about 4 years ago, but there are lots of young squirrels around now. I’ve even got one who hangs out on the front porch (no food ... just a good vantage point?). We have Red-shouldered Hawks that usually nest in the area & since my garden is out in the open, the hawks are a good deterrent. This year, they nested in another part of the neighborhood, so the squirrels are not as fearful of coming out in the open. I did have a hawk on the fence this morning so maybe they’ve figured out that our place is a squirrel-rich hunting environment! I wish the hawks ‘happy hunting’!
BTW, for squirrel bait, I use peanut butter on a cracker with black oil sunflower seeds covering the top - the PB holds the seeds nicely. This arrangement allows me to place the bait in the trap where I need it to be.