The meeting is in June. You should fly. You have to arrive Sunday evening to be there for the start of the conference. Return June 9, 1999. Other expenses should be as carefully defined as they are in the rest of the budget.
Indirect costs seem to scare a lot of people, yet they are very simple to describe.
Indirect costs are intangible costs. They are those costs that are common to a number of projects, like lights, maintenance, building and equipment depreciation, and administrative operations. If you are part of a large institution, you probably need to think seriously about indirect costs. However, if you are part of a small organization, you would probably not be concerned with indirect costs. It would be simpler for you to charge every expense as a Direct Cost.