I think this is the best time of the year to get driftwood.
There are barely any native plants growing in the waterways, no bugs flying around your head, and it is not too hot outside.
I took my two kids and wife out sometime in the last week or two (It's been busy/can't remember). We stopped at a few spots where I know there is hardwood deadfall and found some really nice specimens. After about 20 minutes, my wife knew what to look for, and we had the whole radio flyer filled up. My 3 year old son fell in, and we had to go home. The wood has been siting outside to dry out so I can inspect the wood dry/sun bleached (look for any signs of decay, actually identify the wood type, etc etc).
Most of the pieces I got, are for my 55 gallon and are way too big to boil, so they will get the Walmart Rubbermaid salt soak for what it seems like an eternity, then get sunk in regular water until they are aquarium ready (tannings leach).