Have the healthy attitude that there is no such thing as a stupid question. If others are afraid you will go ballistic when asked a question ,you wont get the best results from your helpers. Make it a fun challenge - Choose a reasonable deadline and challenge them to complete the project before the deadline. If you have teams, there s nothing wrong with a little healthy competition. Dangle a carrot -everyone when working, works for a reward of some kind or another.
Rewards can be a simple gift certificate ,getting off an hour early or free lunch.
My husbands company buys lunch for employees when they need to work on a mass mailing. Think the best ,hope the best and express the best towards those you need help from. Show this attitude in truth ,not trying to use it to manipulate others. It gets back to the golden rule Do unto others as you would have someone else do to you . There is a solution.