Got out to Mack's Canyon for a couple of days last weekend. I think it will be a good place for the meet and greet. There are 14 campsites that can hold two vehicles each and two group campsites that can comfortably hold 4 to 6 vehicles each. There is also one handicapped site. A play field is also available. Reservations are not accepted.
Mack's is a BLM fee site.
The only drawback that I see is that no fires are allowed between June 1 and October 15. Propane fire pits are allowed.
Are you and angler? Please make sure to know the rules.
Last year some species of fish runs were closed from June 1 to August 15. Am not sure if this will happen again this year.
There is a boaters fee to float the river.
Playfield
One of the two group campsites