I take a 5 day trip on the Deschutes in central Oregon every May. We can usually plan on 2-3 snakes a day buzzing us. You give them a little respect though and they will leave you alone. The Deschutes has it all, rattlers, lizards, scorpions and I just heard this weekend how the husband of one of my wifes friends got bitten by a brown recluse spider there as well. Now that freaks me out. The rest are just wildlife.