With fillings, Kingsblend, smoking afterward ought not to be too big a problem. Oral surgery or tooth extractions are another matter because those cut into the gums and leave open sockets and/or wounds that need to granulize and heal over, which happens at the capillary level. Smoking can interfere with that process because it impedes capillary mending and circulation, thus slowing healing and increasing the risk of infection if, for instance, a patient got a dry socket. But in the case of fillings, they're just basically drilling out decayed tooth and then filling in the indentation with the composite resin. You won't have open mouth wounds that are needing to seal over. If you do--or if you have such involved cavity cleanout that it causes any gum bleeding or soreness--you would probably want to go easy on the smoking for a day or two, yes. But if they're fairly simple fillings that don't damage the integrity of your gums, you'll probably be just fine to smoke a bit of grass if you want to. You won't likely be smoking enough that you stain the composite resin bonding. That normally takes a bit of time.

Good luck with your dental adventures! Sounds like you're going to have a pretty smile!!