What are good restaurant related questions that I can ask in a survey for the purpose of exemplifying the market to investors?

We want to open a restaurant (to later be franchised) in a small upscale tourist town with some very unique locals and tourists (lenox, ma). Its a hot spot for organic, local, and fine dining. I am currently creating a survey for the locals and tourists this weekend. My question is if there are any good questions Im leaving out that investors would like to know. This is what I have so far: I give them a choice of three different restaurants-different themes-food types-missions etc. I ask which they would prefer or if they would just prefer their favorite local place over all three choices. I ask if they are a local or on vacation. If they choose one I ask if they enjoyed the food and it was a median price for the town would they frequent it. 1. a few times a week 2. once a week 3. once a month 4. once or twice a lifetime. I dont want to miss an opportunity while Im in front of these people- is there anything else I should be asking -considering the starting point (have not chosen restaurant yet- gathering info on which is most favored) i will also be giving them the website and letting them know if they sign up they can be involved in the choices and also get their first meals free for their family. Thanks! additionally: if you know of any follow up questions I should do after I have gathered the info for which restaurant they would like the most- let me know- thanks!