If I remember this right, the thing to keep in mind with PayPal is that you can receive payments with no fees when someone is using their paypal balance or a bank account balance transfer, but the first time someone tries to use a credit card it will force you to upgrade your account to a premium account (no charge I don't think though when I first set mine up years ago there may have been), and credit card payments cost $0.30 + 2.9% of the total per transaction. So if the campout fee is $10 and someone sends the pack $10 via PayPal using a credit card, PayPal is going to keep $0.59 of the total, so the pack will only come away with $9.41. I know for my unit every penny counts when we're doing a budget for an event, so to lose nearly 6% of your available funds (in this instance) is going to be a problem.

It might be more trouble than it is worth, having to know what the fee is for cash or check payments and a different fee for credit cards via PayPal. To get a paypal payment that works out to $10 even for that activity fee after Paypal gets their cut, you'd have to charge $10.61.

If you have an annual pack fee of $50, to get that amount via PayPal you'd have to charge $51.80 to get that actual $50 fee.

It seems convenient but it might be more trouble than it's worth I think.