shanon, we don't have "tarmac" events.... mostly there are also gravel roads included …. mud etc...
I started with Kumho semi slicks but changed quickly to winter tires…. ( Michelin Alpin) : first rally in februari there can be snow , others not anymore , but those tires perform well in rain/mud.... and good enough on dry tarmac. We don't use a service crew , ( $$$$ ), so we have to drive the event with the tires we start... and weather changes here often from sun to rain …. remember , this is "regularity" , not "rally". We must drive "average" speeds , no racing , on unknow roads , so navigation is almost "more" important , included difficult map reading …. but fun ! ( and less stress and $$$$ as rally …. i did it many years , but no more )