And OP once again. Thanks to all for the thoughtful advice (I'm not including comments on his pee-pee in the thoughtful category
Most of the things everyone has said are the things I've been puzzling over myself. Whether it's all lies or exaggerations, or if it's true, why he feels compelled to lead with it. I agree with the people who suggested under-promising and over-delivering, and that's kind of been my MO in general when dating, so I don't understand this.
I do think his relationship history will reveal some things (especially if he's recently single after a long relationship - that could explain why he's kind of desperate and selling himself hard) or, as others suggested, has a lot of short term relationships as that may suggest he just says all this to get laid and then moves on.
This won't be my first online date, and I am cautious. Will not be getting in his car, going to his house, etc. for the first date, or for a few after that, even if the first one goes well. That actually has nothing to do with how he's behaved - it's my m.o. for everyone I meet online. I do always send a friend whatever details I have about the guy, along with screenshots of his profile, and the time/place where we will be meeting before the date, with a plan to check in afterward, and I'll be doing the same with him.
As one poster said - he may just be a bit over-eager, or as I've been considering, like the human equivalent of a Labrador. All excited, jumping around, about everything. His messages are quite a bit like this - it isn't just his lifestyle he's enthusiastic about - when he describes anything there are a lot of very enthusiastic adjectives used.
And to the person who said I could order the steak without feeling guilty - I lol'ed at that. I actually dialed his first-date plan just back to drinks, but after I did, we were talking about a new steakhouse that just opened and he immediately said "well if the first date goes well we'll have to head there on one of the next ones" - so, a steak does have the potential to be in my future.