Driftwood rafts can apparently last as long as 20 years:
We found that the floating wood and its crinoid [sea lily] cargo would have been able to last for at least 15 years and maybe up to 20 years before the log would begin to sink or break up. There is evidence from museum collections of fragments of wood with entire, fully grown crinoids attached to them that could only have resulted from this kind of collapse …
We found that the crinoids do indeed hang suspended underneath the driftwood, but clustered towards one end of it. Although difficult to observe in the original fossils, the pattern resembles that of other modern rafting species such as goose barnacles. They tend to inhabit the area at the back of a raft where there is least resistance, which can tell us the direction of travel of the colony across the ocean.
Aaron W Hunter, “Ancient sea creatures spent years crossing the ocean on rafts – we’ve worked out how it was possible” at The Conversation (August 10, 2020)
And, of course, small life forms would cling to and travel with the crinoids, wherever they drifted.
These are crinoids: