I would dress like a bum and I used to joke that the car was my coat and tie...

There could be a bomb or a gang of jerks dressed in black making a youtube video down that way. 

I like the idea of moving the water and gas lines.Alternatively, is there a way of dressing up the entrance hallway so it feels like a mud room / foyer?

I am simply wondering what is common etiquette and dress at most meetups such as these?

Here is a picture of me beside a Cessna we chartered (admittedly, my friend decided to dress casual).

When meeting with them always make sure you are dressed professionally and act mature.

We took the "five generation photo" once again for this holiday (my wife's great grandmother is 96) and we don't for one second take that for granted.We all had a big laugh because my wife's sister made the "dressing" side dish by following great grandmother's recipe...which was written down wrong...1/4 cup thyme and 1/4 cup sage...yuck. 

The dress code thing is a good point.Another point is your presentation, it is how you present to your client that would make them remember you.In saying this, you have to gauge your client's personality so you can use the proper approach and nail your presentation.In general people tend to forget facts but will remember how they feel about it.

Well it's about 94 degrees that day and I'm dressed in a suit and not exactly wearing the shoes to be taking the two mile walk we're about to go on, but how am I saying no at this point? 

That covers cleaning, dressing the beds, throwing our garbage, etc.