Boy I dunno about that! You're talking like 3000 pounds or more even. Your weak point is your brakes and tranny. I had an Astro van and pulled at old 15' camp trailer occasionally and it sure seemed like it was working every bit of that van to pull that trailer. I would guess it to be similar in weight to what you're wanting to pull and any hill is going to make things worse on your truck in that it will work harder. A 1/2 pickup would be better for sure but if you do that, get at a 3/4 ton with good brakes, and tranny and tranny cooler and you'll smoke up the hill and won't have to worry about tearing up your Tacoma....And you could get a little bigger, more comfy trailer too.