Yeah, we tend to blow a little smoke at times.
Some ranges DO limit the days and hours when muzzleloaders are allowed for that very reason, so check your local range for that possibility.
On a open range, try to use the wind in your favor. If it's blowing at you or away from you, it really isn't a problem (just remember not to breath for a couple seconds after firing if the wind is in your face). If in a crosswind - try to get a firing position as far downwind as you can to affect the least number of people. And if the end slot is taken - talk to them & let them know what's coming....................if it's a concern to them, They will probably trade with you. Afterall, MOST folks at the range are good people.
In over 3 years I've yet to have a problem at my ranges..................... just remember a little courtesy can go a long way when dealing with folks.