Considering any teams who decide to compete will need to be at the track for 3 days, in order to receive 1 payout, I'm thinking the field will not be a large one, unfortunately.
Here's the schedule from
http://www.atomicspeedway.net/
3 DAY OPEN WHEEL CHAMPIONSHIPS:
Sprints, Non Wing Sprints Unsanctioned with Modifieds
October 23- Sprint Practice, Non Wing Qualifing & Heats, Modified Qualifying & Heats
October 24- Sprint Qualifying & Heats, Non Wing B-Mains, Modified B-Mains
October 25- Sprint B-Mains & Feature $15,000 TO WIN, Non Wing Feature $5,000 TO WIN, Modified Feature $3,000 TO WIN
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Personally, I think this should be no more than a 2-day show. If they can only pull off 4 races on Saturday, it'll likely be a long day/night of waiting around.
(I also find it comical that they refer to the classes as Sprints, and Non Wing Sprints... shouldn't it be vice-versa?
)