Very few of my campaigns have involved planar travel, in part BECAUSE I dislike the Great Wheel. I've had campaigns involve Faerie before, and sometimes to parallel universes, but didn't consider these 'planar adventuring.' I've occasionally GMed expeditions to the elemental planes, and, IIRC, maybe once or twice to the actual outer planes. Didn't like the latter any better in play than I did reading about them.
I suppose technically, I GMed an adventure in Dal Quor (Eberron's plane of dreams), but it was in a Spelljammer campaign, the players didn't know that was what happened, and if the campaign had continued in that direction they would have found it wasn't 'planar adventuring' so much as 'subconscious astral projection to a highly morphic space.'
I've done quite a bit more planar adventuring as a player, and never cared for it.
Oh, and things FROM the Far Realms are often involved, but PCs have never gone there.
In 4e terms, I'll likely do more 'planar adventuring' because Faerie (er, the Feywild :\) is considered an outer plane.