Show in noblesville indiana

Has anyone been to the music center in noblesville indiana? Not sure what tickets to get for the LP/ Incubus show. I will have a 10yr and 13yr old with me. I see lawn seats are the cheapest but not sure what kind of veiw you get from there and also how safe an area with no seats is for the kids. Having to pay for 4 people my self im trying to be affordable. For anyone who has been to this location before what are your opinions on it as far as best cheap seats. Also…I see this is an outside location. Is there any kind of cover if there is rain? Thanks!