We stayed 3 nights in Ironbridge Gorge in May 2017 and loved it. Rick says that "without a car, Ironbridge Gorge isn't worth the headache". We disagree. We took the train to Telford, and then an inexpensive taxi to our B&B in Ironbridge. When we left Ironbridge 3 days later, our B&B hosts called a private car taxi (similar to Uber, I guess) for us and it was even cheaper.
We planned our stay for the end of May Bank Holiday weekend, so the Gorge Connect buses were running all weekend. We used the buses to get to Blists Hill one day and the Museum of Iron the next day. Very easy and fun. Plus, if you buy the Passport Ticket, you can buy a 1 GBP bus ticket that is good for as many rides on the buses as you want in one day.
The bridge is right in the center of the town, so you can walk to it whenever you want. Everyone is very friendly and the town itself is very small and walkable. We followed Rick's Ironbridge Gorge chapter for our B&B, restaurants, transportation, and all the sites.