Grand Tetons and Yellow Stone Parks, need recommendations

Hi,

We will be visiting the Grand Tetons and the Yellow Stone National Parks October 11th through October the 13th and would like some recommendations from the experts.

We have a budget so staying at a fancy place is not an option.

We are in our late 60s, we love hiking and photographying beautiful sceneries.  We would like to know where is the best place to stay without breaking our budget.

For hiking, what is the best trail to hike for photography along with an excellent workout.  Elevation is not an issue for us, as long as it is less than 5000feet gain/loss and less than 7 miles long RT.

Thank you.