Here in MI the best choice is to buy your own tank and call around when needed and go with the best offer. Always difficult when you have a company-owned tank, they got you where they want you. A used tank is not that expensive and will pay for itself in a couple of years, especially if prices get anywhere near where they did in 2008.....
i own my own tank just top it off every summer just for cookin and heatin the water, heat the house and shop with wood ps:try offern the driver cash