Did anyone else find it odd that the OP's questions were all really specific to logistics questions that would be very hard for an outsider to answer? What would I do if I thought a guy was LE? -- Holy shit, I have no idea. Why is a guy in my house to start with?!?!
Seriously though, on the LE side, I'd excuse myself and go to the bathroom to think about how I screened him -- and what holes there might be in my screening. Kinda of a "am I paranoid or is it possible he isn't ligit." After I've identified the holes, work up a quick plan to plug the holes. Then I'd politely go back and give him his money back, a simple "there must have been a misunderstanding, this kind of gift was unplanned and completely unnecessary." Be very nice and VERY firm that he take it back before proceeding. Then I'd just drop into honest mode, explain my concern and work through my plan of how to plug my screening holes ("I just need to see your DL to see that you really are Bill and your birthday is 17-April.") No, he's not going to like it. But it beats the shit out of jail.
The real critical part though is to follow up with implementing better screening. Do that once a year and *maybe* the reviewers won't peg you as paranoid. Do it once a month and you're going to see things get very hard for you.
But as some already said, I know jack shit about this business. You probably can't leave a client alone unsupervised either so part one of my plan is shit, much less the rest of it!
Again, I can tell you what it's like from my perspective -- I can't tell you what it's really like from yours.
Things I would easily do that I find it odd aren't done more often? If things are really slow, I'd offer for the client to come 30mins early to have a drink and relax. Fuck, if you're sitting at your incall answering emails anyway, why not offer your free time as an act of good will? Also, at the end of the date, after I've just pretended he's Adonis and I might leave everything behind for him, I'd tell him... "Hey, I enjoyed our session and I'd like to stay in touch. Would it be ok if I contacted you in the future? Are PMs, emails, texts, etc, best?" Don't push, but if he gives you the ok to contact him... wait a month and then DO IT! Nothing says happy like thinking a woman digs me.
Oh and there's a slick chick in Austin (well, she was there last year) that specializes in FBSM that makes it super-easy to schedule via a phone app once your approved and have seen her before. Impressed the shit out of me. Absolutely no drama, waiting for a call back, is she available at all, BS!