My wife and I signed up for an Appleseed weekend while at #NRAAM2017 (Martin, 6/3) The big question I have involves the "USGI sling". We mean to bring two Ruger American .22 bolt action rifles and two AR-15 pattern rifles. Should we buy basic webbing slings without the shoulder pad stuff? I was looking at those in a Dick's store. But, something I read sounded like an Appleseed event would have slings for sale. Would we wait and buy one there? I also have a padded Vickers Adjustable Combat Sling with QD attachments for an AR. Is that suitable, or do we need to consider the basic webbing sling for the ARs as well? If so, what? The Ruger rimfires have Nikon 3-9 rimfire scopes. Are those accepted or are iron sights really recommended? My thought was to see both worlds with scope on .22 and peep sights on ARs. I'll be grateful for any advice, sling or otherwise, to make our first Appleseed a success. I am so looking forward to learning.