I have not been to a traffic before, but I go to similar conferences in similar hotels 4-6x/year.
You pretty much have named the minimum expenses for a trip like this. In addition to the conference ticket, hotel and air, expect to pay...
- mid-high $xx/day to eat in the hotel restaurants
- low-mid $xx taxi fare each way (unless there is a hotel shuttle, in which case you are just out a small tip)
- depending on how far you are flying, low $xx to eat at the airport, each way
Obviously, you are on your own for entertainment.
You can bootstrap a lot of this, if you have more time than money. There is usually a smaller hotel or even motel in walking distance to these bigger places, where you can save as much as 75% on the cost of a room. Be aware of the expected weather reports, and if it is really hot or wet out, budget for a quick cab ride just in case. You can pack your own snacks for the trip, and do a little shopping at a nearby market for food while you are there.
I like kayak.com to find the best airfare, though they do not list a lot of the budget airlines, so check places like southwest.com and allegiant.com directly. You can use kayak to find other hotel options as well, but be sure to check out venere.com as I have found deals there that were better than anything on any deal aggregation sites. You may be able to save a few bucks by arranging shuttle transportation ahead of time, if it exists. Worth looking into.
A lot of the big hotels are including internet access in room rates now, but the ones that aren't often charge $15-$20/day, so see if you can tether your phone instead.