i love microfiber towels, but if i know its gonna be wet, next time i'm bringing a chamois, its the onlyway 2 towels would make a round with the ability of actually drying discs
for slick concrete pads, you can have a 3rd towel and lay it down on the teepad and use it for your footing (it is legal on the teepads)
good luck stayin dry, i think a cart with an umbrella holder would work the best... but when you get to your lie chances are the branches will soak you just the same, but keep your feet dry - boots, waterproof socks?, when i played soccer the mexican refs used plastic bags over their socks, inside shoes... that works great, but looks goofy, in a pinch its the shizzz
could try a rain coat... but long sleeves bother me, so i'm unsure about a heavy rain coat, a trash bag with 3 holes would be much less of a hindrance... but would snag/tear easy on wooded courses
nice ideas about a birdie bag, i'll have to give it a shot
i have issues with my fingers pruning up after a full round in the rain, the 2nd round feels brutal on worn skin,
depending on your bag, either cover it always and only put clean discs in - or like my bag its just easier to keep mud out, but leave the drying until your going to throw that particular disc
bring ziploc bags for cigs, cell phone etc
if its a 2 rounder, a change of clothes and shoes is priceless
i dont mind being wet, but thinner clothing weighs lot less when wet, instead of a sweatshirt wear a long sleeve tshirt, once its wet temp will be the same, but much less interference
cleats work great, i use an astroturf type cleat so i dont dig ruts - i wouldnt do that to a nice lawn course, but most our courses seem to be muddy most the time anyways
i'll try to think of more, but just plan ahead to be wet, if thats an issue, stay home and play on DGCR