I suspect that the relative availability of white gas or kerosene would vary in different parts of the country. I've never seen kerosene available in gas stations around here, but the local Wal-Mart sells Coleman fuel for around $12/gallon. If gas stations where you plan on touring carry kerosene, and if it's easy to buy the small quantities you need for a cycle tour then that would be the way to go. If you end up in an area where white gas is the easier option, switch to white gas.

I would use denatured alcohol,in the trough under the generator. Paste might be easier to deal with.