You might want to check out the pitch glue resin recipe on here. Yeah, I am not bothered by the sap, but a lot of people are. Of course, Mango sap, and poison ivy don't bother me either.
As for the glass, it was used by the N.A. and in Australia back in the early days, they had problems with the telegraph lines, because the Abbo's would climb up, and knock off the glass insulators, and knap them for arrow heads, or rather atlatl dart heads, as I don't believe the Abo's used bows and arrows.
I could be wrong. But just take your time with the arrows, and they will come out nice. Yeah, if you have access to legal boo, by all means get that, instead of what the park so graciously planted for us.......
I....... uh....... know someone who uh, gathered some ...... on ..... a Sunday....... they make pretty good arrows, in fact there is a small bundle here, waiting to be made into arrows.......
Check your yard for rabbit pellets, they look like cocoa puffs.
Use them in your pitch glue. It acts as a binder. Uh..... crush them first.....
Like I said there is a good tutorial on this site, that some one put up. You can use sawdust, etc. But if you are going to stay all primitive....... Buuuutttttt....... Brazilian Pepper, isn't native to Florida.......
Another non native species, that is bigger nuisance is Maleleuca, it is a heavy, and HARD wood. You might try to make a shaft out of that. Never bothered with it, except in wood shop, in High School, when a kid brought a piece in and sawed a board out of it, and made an address plaque out of it. I remember it being very hard, and heavy, for it's size. I don't know anything about it's flexibility, as for shafts. Might be a waste of time.
But it might be the shaft material of the century, and definite good means of eradicating it from Florida, and stop it from spreading and drying up our wetlands. Besides I hate the smell of the blossoms, they smell like rancid butter. The paper bark, has medicinal properties though, it highly anti microbial. It is in the the "Tea Tree" family. I think the Abo's used it for water purification. Anyway, good luck, and let us see the new arrow, when you are finished with it.
Wayne