There are companies in my area that cater to this very type of service. One such company is called Aqua Duck - but I think they're local in PA. I have also heard that some fire companies will provide this service as well, but you'd have to inquire at your local fire department.
One thing to consider though is the price. Filling my 22,500 inground pool for the first time, I could have paid around $800 to have a tanker bring in my water, or around $78 to the water company to fill it from my garden hose. I realize your situation is different due to a well. I suggest you look around for water delivery services.