The Maypole and the Bonfire have long been the two ritual foci of Beltane celebration.
The logistical problem being that a ritual can't have two centers.
I remember running into this difficulty decades back while planning the community Beltane down at the old River Circle by the Mississippi. We wanted both a Maypole and a Bonfire, but (unless you want to burn the Maypole, which is wrong) they're mutually exclusive options and only one of them can be in the middle of the circle.
In the end we settled for a central bonfire with the Maypole off to the side of the circle. After the Maypole dance, as darkness drew in, people (of course) clustered around the Bonfire, leaving the poor Maypole deserted.
I.e. not really a satisfactory solution.
Historically speaking, the Maypole is a relative newcomer to the Beltane celebrations (there's no documentary evidence for it until the early modern period), while the Mayfire is clearly prehistoric (the name Beltane itself originally meant “bright fire”).
But the tension between Fire and Tree is more apparent than real. Our problem is trying to cram both hands into the same catskin glove.