Gun Show tips for a noobie

I have a month to save a few extra bucks for the local gun show (Aug 6th and 7th). The website says it costs $8 entry fee for adults. I own an old .22 from very early 1900's, but other than that I don't have a firearm. Here's my chance to get a nice rifle or two. I need some tips since I have never been to a gun show. A few guys from work might go with me, and they are noobs too (as you can tell, I've sparked a few thoughts in preparedness in a few people).

With that said, I don't want to get ripped off. I have a few things I've learned to prepare for but also I need expert advice from you guys.

1) I heard the local paper might have a coupon for discounted entry fee. I will be checking this out every weekend.

2) I know that I need to pay in cash, that is ok. But would booths accept silver instead? Should I even bother with bringing some? What cash denominations should I carry?

3) Since I'm going, potentially, with a couple friends... could we better a strike a deal with a single retailer if we buy all our guns from them? Three guns for a discount is what I am thinking.

4) We don't have conceal carry licenses, so we will be focusing on rifles or shotguns since the law doesn't require special credentials.

5) One of my friends is thinking of an AK47. Are there certain firearms to stay away from at gun shows? Should we expect that firearms are used?

6) How much can dealers haggle and what is considered inappropriate to counter bid?

Any other info is much appreciated! Thanks.