Thanks! We celebrated the Processional this Sunday too (if you look at our blog), though this is the first I'd even heard of it.
There might be a reason for that. The Rogation ceremonial is related to agriculture and was the source for the words 'beating the bounds'. The Processional would wind its way about the Parish, the Priest blessing the fields and barns asking God's help for a good harvest. As people have become so predominately urban, this is mostly fallen out of use. We live in what is pretty much a rural community with lots of farms, so we're reviving it.
The nicest part was that we had some children brought in who are taking their Confirmation class at the major UMC in town. This was something they had apparently not ever seen either and they left a bit startled. But what was even nicer, they left pleased as well.