Grand Teton Park, Moran, WY

We are planning a trip to the Grand Tetons and Yellowstone in July. I know, it's the busiest time of the year and we don't have reservations! My question is, if we stay in Colter Bay, will we be able to do decent day trips into Yellowstone? I would like to stay where there are hookups because we are brand new to camping in our hybrid. I have already been advised that traffic will be horrible, but I'm looking at the bright side, as it's more time to take in the sights!