Northpoint slip information:
Contact Cindy Holland at Northpoint Marina
Tell her you are with Chicago Offshore Powerboats
$15 per night for any length boat
They will try and keep everyone together in large slips, but the downside is that low voltage power will not be available. It will probably be 50A 240 V which requires an adapter that can be purchased at West Marine or other retailers.
If you need low voltage power it may be available but the chances are slim. All of the smaller slips with low voltage power are sold for the season and it is doubtful that many people will be leaving during the biggest party of the year. You may be able to get it but you will probably be away from the group.
Please contact me if you have any questions