How much would you pay a couple young adults to help with general clean up and moving tasks?

I'm moving in about 6 weeks and was thinking of hiring a couple young men to help with some basic tasks such as disassembling a swing set, moving & staging some items, etc. The work would be moderately physical but nothing extremely demanding. I'd be completely flexible on the schedule and mostly have them for a few hours on evenings or weekends - whatever works for them.

I already have a couple young men in mind - its a family friend with 2 older sons, about 16-20 years old (I don't know their exact ages). They live a mile away from my current house so I would pick them up and take them home if necessary. If I need them to help with actually transporting stuff to my new house it would be in my vehicle and I'd be going with them so they wouldn't have any costs for gas and I'd pay them for the entire trip.

I was thinking that somewhere between $10-$15 per hour to would be fair. All cash, paid each day they work with the idea that if they do a good job I might give them a bonus or a gift card or something once my move is complete.

Is this reasonable? Too high? Too low?