Scion won't climb!

I live in fl and most of the time my Scion is just fine, however, I have a cabin in the North Ga. mountains and boy did I get a shock this summer. That little baby would not go up that mountain road. So, now what do I do? IF money were no object I would just trade it for a heavier, bigger car, but that is not financially possible. SO, would it work for me to pack the mid sction and the front seat with very heavy things? I go up there by myself often, and after a 600 mile drive I don’t feel like getting scared half to death as it just won’t climb!!

duplicate post, see