Good advice OS

I try and focus on the main areas of excess heat. The one area I can do something about is the armpits. I will either go with Sleeveless shirts or tanks which is my usual work attire. It is amazing how much difference it makes.

But of course tanks in skeeter country and being burnt to a crisp isn't always a proper course of action. Enter in rail riders clothing. Much of their stuff has ventilation galore. The Eco mesh shirts have a strip of full length mesh on both arms right up to the armpits. Perfect for letting out excess heat.

For the other  area which gets bakified I merely strip off down to the base layer.

And of course choice of hats has a lot to do with keeping your cool. I'm a big fan of the Sunrunner Lid. Light material with snap on neck protection.  Simply primo.

Many of the writers suggested leaving the fly off of the tent. I check my weather radio before retiring to make sure nothing is brewing. As you know, when it is hottest and muggiest, frequently it portends a brewing storm. But, if it seems OK, I will put the fly half on, leaving the upwind side exposed. The other half can be left loose or tied to trees on the upwind side. This acts like a funnel to direct any light breeze on me. If rain does come, since half the fly is on, it only takes a couple of minutes to attach the remaining side.

Bandana - dipped in the lake and tied around the neck helps a lot - repeat when it dries out.  so does dipping your hat in the lake for evaporative cooling.  Occasionally, I'll even drop a hatful down my back - amazing how cold that feels on a hot day.

I wear a "doo-rag" I made out of Bug-Off brand handkerchief under my nylon/mesh baseball style fishing cap. If the sun isn't an issue, I just wear the doo-rag paddling and on portages.

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Protects ears/neck from sun/bug bites and can be dipped in lake to get a cooling effect.

I don't like to drink warm water but you have to stay hydrated so I use this simple trick.
If you using a standard size water bottle, take a old cotton tube sock and cut off the toe end.

Sleeve the bottle with sock and keep the sock wet and store bottle while paddling out of the direct sunlight.
The evaporation will cool your drink.
If you have bigger water containers, I have a couple of 1-2 litter Naglene Canteens and use a canvas bank coin sack secured with a Bungee/Bob around neck and do the same as I would with tube sock.

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This evaporation method allowed me to keep a LT I caught and cleaned on Jean lk, cool/fresh all the way down to Sturgeon lk and then to Scripture Island campsite on a day that was in the high 80's. Just keep the sock/bag wet and out of direct sun and your good to go.

I use ST's evaporation trick on my entire food pack (the one with cheese, salami, etc) by soaking the hand towel, or one somewhat larger, and keeping the pack in the deepest shade I can find and draping the wet towel over it.