If you do get the chance to visit, definitely make sure to go at night - without the light spectacles this place is not as great. Overall, just felt estranged and a little skimpy for modern Vegas.
The Deuce bus provides transportation between the Strip and Fremont Street Experience; the price for a pass for two hours is about $6, so if you just visit for two hours, the transportation cost won't be too much and you should be able to catch a ride back with the same ticket. We got a Lyft ride here and the price was about $12, which would have been the same for two people bus ride anyhow.
Feel free to meander on and off the street; there are some nice brunch places around the corner - we ended up dining at Glutton, which was delicious!