I reckon it might work to just bake it without using the bowl-shape. Wouldn't be as crispy as a typical tostada but might still have some crunch to it and would probably be healthier baking vs frying lol
Also, sidenote, is 2 hours too far to drive for taco bell?
Just make sure you use the corn tortillas, the flour ones aren't the same.
And heck no! 2 hours, even if it's both ways, is not too far when you have a craving. I used to drive 4 hours (252 miles) one way through the Rockies to go to an awesome burger joint in Denver called Cricket Burger.
Or Drive 90ish minutes into the mountains to go swimming in a hot springs pool and then back again after 2 or 3 hours. haha.
Are you becoming British? haha.