Mosquitoes are drawn by body heat, not smell. A fire helps as does a lantern as it confuses them a bit. Kind of like messing up night vision with a bright light.
40% repell works well or Deet or Off. Course a good coating of river muds works real well to...lol
For those calm to light wind nights take a cintronella bucket and light it up wind on the bank or in the boat. Keeps em off you real well.

Thermacells are supposed to be great but im not buying a unit then haveing to pay 4 or 5 bucks for each stick which lasts about 8 hours. I can buy two or three cans of 40% deet for the same price and last a whole LOT longer.

The BEST tip? Find a fishing buddy who has a slightly high body temp and make em wear dark shirts and the skeeters will leave YOU alone..lol

Yeah i got to thinking about that and did a lil looking again. Looks like i got the primaries backwards.

"The female mosquitoes locate their next blood donor victims primarily through scent. They are extremely sensitive to the carbon dioxide in exhaled breath and exuded through the pores, as well as several substances found in sweat and various body odors. They are believed to be able to track potential prey for 10's of meters. Some people attract more mosquitoes than others, apparently based on how they "smell" to a mosquito. Mosquitoes can also detect heat, so they can find warm-blooded mammals and birds very easily once they get close enough. Repellants like DEET work by disorienting the mosquito as it gets close to its potential next meal but does not kill the mosquitoes. Surprisingly this works about 95% of the time."

Funny thing is blood don't feed them. It just provides proteins for the egg development.
"Both male and female mosquitoes are principally plant nectar feeders. Only female mosquitoes imbibe blood so that they can get their eggs to mature prior to laying. The blood serves no nourishment function. Males don't suck blood and their probiscus is not specialized to suck blood--so they can't. The Toxorhynchites, species of mosquito never drinks blood. This genus includes the largest of the extant mosquitoes (colloquially referred to as "skeeter-eaters" and "mosquito hawks"), the larvae of which are predatory on the larvae of other mosquitoes. These mosquito eaters have been used in the past as mosquito control agents with variable success."