I haven't done the smoked pineapple, but I grilled them for our memorial day cookouts. Here is the recipe that I used:
1 Pineapple
1 cup dark rum
1 cup of butter - no margarine
1/4 cup of worchestshire sauce
1/8 cup of lime juice
1/2 cup of honey
Cut the pineapple into your chosen shape, making sure to cut out the core. I prefer pineapple boats, but I have also used canned rings with good results. Set pineapple aside.
Melt butter in a non-reactive pan, I used a stainless steel pan. I am really not sure what a reactive pan is, but I am sure I would have found out.
Add the rest of the ingredients, and simmer for about 20-30 minutes until it starts to thicken up a bit.
Pour over the pineapple, and let it soak in the juices for a bit. I let them sit for about an hour for the pineapple boats, and about 10 minutes for the rings.
Put on a good hot grill, or in the smoker, for a bit, about 2 minutes on each side in the grill was fine, but that was about 350 deg. I would expect 10 to 20 minutes on the smoker at 225.
Good luck.