Hi,
I have a friend who is a Rabbi's wife, whose family keeps strict kosher. I have had to seek her advice in the past about what to do for kosher guests.
First off, obtain disposable cups, plates, forks and knives especially as they will have no interest in using your provided dinnerware. I assume some meals for the conference will be on-site, then you may pick up from a Kosher deli and remind them you must keep Kosher. They will help you with the drinks, condiments, meats and breads. You will know you are in the right place if it has no Saturday hours.
I am fortunate for these situations, the Jewel in Highland Park has a Rabbi-on-the-premises supervising the kosher deli section.
I have had several guests from Israel on business. AS much as I was working hard to research where to go to accomodate their diet. They had also done their research to avoid an problems. There are websites which cater to this situation, which you may want to google.
When my friend went on a cruise a few years ago, they ordered all their meals from a caterer who delivered them frozen to the ship. They had a designated microwave for their preparation, all their meals were on Chinet plates and the they were happy as clams (which are not kosher). Also, she always carries snacks with her to accomodate the need for a quick meal in transit.
BTW - There is a Dunkin Donut's on Devon, which is Kosher.
If and when I catch up with her, I will provide more specific information on loop-oriented kosher spots.