The food is still free if you are staying at their campground or doing true business with LD. You are given a coupon for your free meals. LD had to do something because they were feeding allot of people that just came for the free meals and had nothing to do with LD or RV'ing at all.
Yes you should be concerned about which used coach you select. Several manufactors have had issues during the model years you are looking at and you need to be aware of those issues and either shy away from those coaches or be prepared to have those known issues fixed, often times on your dime.