Nancy, it feels like this started in the middle of a paragraph and in the middle of a sentence. I'm sorry, but I don't know what you mean by the first "sentence" (which is really a fragment).
- The recommendation is burried in the paragraph.
- 12:00 a.m. is midnight - it would easier to just say "noon."
- The vendors will sell (not sale) their products.
- I would suggest that you don't need to talk about the vendors' increased profits - it should be clear that that arises from more sales.
For our next event, the Committee has set the date for Saturday, March 2, 2007, and suggests it be held from noon to 5 p.m. The longer time frame will allow more people to come, allow them more time to participate and view [what is it they are viewing?], and allow our vendors more opportunity to make sales. From previous experience, we know people will come and go throughout the event.