Heads up for a giveaway tomorrow!

After I do all my shopping tomorrow, I wanna test out my new toy - rafflecopter! I'm debating whether I should do 3  or 4 winners for some coupon envelopes or just one winner with a BIG envelope of coupons, any suggestions? Should be posting it probably around 4pm EST and letting it run for a few days to give everyone a chance to enter!