Thanks for the ideas from all. Appreciated.
Had to look up what a gurney strip was - that's what the drip edge would give - a vertical metal drip edge matches the wiki pix - see pix attached below but I like the idea of a hot wired out channel as well. Will have to choose at the time I decide how long an overhang will not get in the way. The drip edge added after canvassing will be quick and easy and a couple of inches overhang will not be a head banging problem. A couple of inches will also be enough to solve the water running down from the teardrop roof and a fabric awning or pop-up tent will give more cover than any possible overhang.
I have just about finished cleaning out 30 years of accumulated junk

to make room in the garage for a working area. May and the first couple of weeks of June are usually pretty rainy here so an indoor work area would let me work full time on the teardrop (retired old fart here). Still have to make a dump run and rearrange wood tomorrow. Looks like thunderstorms the rest of the week as expected.
Anyone from around here want an old cast iron openfront fireplace free ? Thing weighs a ton. PM me if so.