The impact with any convention is usually limited to check-in, in and around the main building or the Pepper Market. Being a Salsa competition, I don't think they have tradition breaks during the day like a business convention would for lunch and dinner. The competitions are probably continually going on in the convention facilities. It also does not look like a huge competition with lots of guests. What I've observed from any convention is that the buses and pools are less crowded and the Pepper Market can get crowded at lunch and dinner. If we choose to eat at the PM, we would do it earlier for lunch and/or dinner than traditional times to avoid crowds.
I think I read this was going to be televised on ESPN too. Might be fun to watch if you get a chance. Tickets are available.
Link to the salsa championship website. Looks like a big dance contest.
http://www.worldsalsachampionships.com/index2.htm
Thanks for putting my worries at ease Buzz!