Neil--
Thanks! I haven't tried the aux fuel tank yet but the water separator filter was just serviced and there was no visible water in the gas when we replaced the tank. Also, using 87 octane ethanol-free, so less susceptible to absorbing water. That said, I'll next trip i'll bring my jerry can with the 1/4" spigot brazed in the bottom and some fuel line. With the McMaster-Carr flange fitting you turned me onto... it's a simple swap.
John--
I adjusted the choke and made sure it was fully open and shut when working the lever.
All--
Any other ideas?