Help picking out a pocket square with the suit for a summer wedding. Also, should I include a tie?

[Hawaianhamster]

Hello! I have a wedding to go to this saturday. I have the Havana Light Grey suit from suitsupply (this exact one, but it looks a tad lighter in person: http://us.suitsupply.com/en_US/suits/havana-light-grey-plain/P4867I.html) with a cotton/linen plain white dress shirt. My shoes are light brown double monks.

Since I don't wear suits often (or at all), I don't know what rules there are to accessories. I have a collection of ties, tie bars, and pocket squares...not because I need them, but because I've had them handed down, gifts, prizes, or just bought them cause I thought they were interesting. Here is the collection:




Trying to catch the pattern on the white pocket square and bow tie^





Does anybody recommend the use of these ties or have recommendations on a specific tie/pocket square and where to get them (it seems like more pastel colors would go with a light grey suit, so I might have to go out and buy one)? I live in Chicago so brick and mortars are easily accessible. I was also thinking about the blue floral tie with the blue silk pocket square since both the light grey and blues can go well with the light brown shoes/belt. I would rather not wear a tie though because of comfort and it doesn't seem to be a super formal wedding, but I can be convinced. Also, what socks would go well with the attire?

 

[LA Guy]

It's a wedding, wear a tie. Use one of the navy ones, and something with a matte and not shiny texture.

Use a four-in-hand knot.

For the pocketsquare, just a plain white one.

 

[Hawaianhamster]

Out of curiosity, why not the blue floral and blue pocket square?

 

[double00]

fwiw i really like the purple tie w/ light blue on top of the pile on the right with a lighter grey suit.

 

[Hawaianhamster]

Wedding attire: http://imgur.com/a/0o8IL
Okay, here are some of the ties that you guys picked and I added a few that I randomly chose, mostly out of fun. I forgot to put in a matte blue tie, but I suppose that's not too hard to imagine.

What do you guys think?

Also, I've noticed that my sleeves on my jacket are too short or my shirt sleeves is too long. I'm hoping it's the latter so I can take it in eventually.