I think most cavers know that accepting payment for cave guiding puts them at higher risk of liability, but what about reimbursement for expenses? Gas, food, lodging, etc can get kind of expensive, especially for those who take groups out on a regular basis.
How about requiring a donation or membership to an organization? In WV or VA, one cave owner required cavers to make a donation to an environmental group. The way the laws are written, this was felt to add to the liability risk to the owner. I understand the owner no longer requires this.
How about grottos requiring a donation for borrowing gear? Some grottos have dropped this requirement, while others have stopped loaning gear out to groups that are not made up entirely of grotto members, which, IMHO is a bit extreme.
Should folks accept reimbursement before or only after a trip, depending on if there are any injuries, etc?