Not to be a party pooper, but I'm thinking most fields I've played Scenario's on wouldn't allow something like that due to the lick of flame I noticed at the start. Some of the fields operate smoke bombs that use flame, in a well secured manner supervised by staff, but won't allow the general public to use HOT sources of smoke on their fields.
Check with your field operator. Of course, super fun in the woods behind your house, or near a military base...