Thank you for the great advice, everyone! You've given me more than a few ideas on how to get my fly fishing gear over there as damage-free as possible. As for the wee one, I think I'll avoid the whiskey. Having flown cross-country mutiple times with small children, really, a nearly four-month old infant should travel exceptionally well. Any fussiness or anxiety should be easily remedied by nursing.
Now, what experience do you have with children and wading? Some of the terrain I can travel along shore. Some I cannot. But I do know that I'll have my son in a carrier most of the time. There are people there who have already offered assistance watching after him. For those who have fished with very small children--what techniques do you use? Safety measures?
Great reminders about regulations concerning felt-soled waders. It's not something I spend a great deal of time actively considering here, given that while I've fished multiple watersheds, I've only waded into one. While I'm flying into Montana to meet up with the friends who are the organizers of this yearly event, the actual marathon will take place in the Gray's River in Wyoming.
And because of the location of the event...we're camping! So, in addition to the supplies needed to fish, and care for the little man, we can add camping gear to the mix. I'm still trying to work out what exactly I should bring in this regard, in addition to how to pack as efficiently as possible.
When I've informed family and friends about what me and the little man will be doing, I either receive great support, or looks that indicate I may be completely insane. Perhaps there's truth in both.