Back in the late 70s we would have these pipes that people would make for us in shop that had a "resin chamber". I guess you can find some commercially made. Anyway we'd put a nice bud in the chamber before smoking the bag and then when we were finished with the bag you pull out this stinky gummy bud with the rest of the resin. Very potent.
But what a bummer it is to have only the resin to smoke.
Mostly now I'd rather smoke through a frequently cleaned pipe rather than let it build up for the resin.
Just recently though, I cleaned my small bong after about a half-ounce (way, way less frequent than I usually clean) had been smoked through it. I was completely taken off-guard by the high potency of it. Usually, it ain't much worth it on any day.