I hear your rant, Kryptonite. I see this all the time in Party Cove, Lake Tenkiller, OK. I think most people don't do it intentionally, they just don't know, but I know it still makes me mad to have them drift down to my boat , and then I , not them, have to fend them off.
Anyway, the mistakes I see most of these offenders make are :
(A) Not having a big enough anchor. Don't throw over some little small thing in a huge wind with a pontoon and expect it to catch and hold. Maybe you will get lucky, but probably not.
Get the proper size anchor and also the correct type for where you anchor. I use the largest danforth type anchor Walmart carries ( for a 22 foot pontoon). A mushroom anchor for my
lake is worthless , IMHO, but may be okay if your lake has a mud bottom. Not sure what to throw out for a sandy bottom.
(B) Put out a lot of anchor line with about 6 feet or so of chain between the anchor and the anchor line. It helps it to set better, plus it helps your anchor lline ( actual rope part) not get
worn on the rocks and stuff on the bottom. Don't just throw the anchor over. wait until it hits the bottom, and then give it another 5 feet of line, it won't catch and hold. Like Kryptonite
says , Scope is everything. You will need to go way upwind of where you want the boat to end up, throw the anchor over, start feeding out line and backing up. Hold onto anchor line , so
you can feel when anchor does grab onto something. Then back way on downwind, and follow Kryptonite's advice on putting out an anchor in the back, if you don't want to swing from side
to side on the single anchor line. Even with all this , there are some places that are just poor anchorages and no matter what you do, nothing grabs, the bottom is made of teflon.
I don't raft up much with other boats, but one holiday last year, the wind was really blowing , everybody was dragging anchor except me ( just luck that day). I ended up with 5 boats rafted up with me, with only my anchor line holding us all. I just got sick of all of them dragging anchor back to my boat, and finally I just started telling them to tie up to me , and ended up with the 5.
Anchoring is a bit of a learned art, and I am by no means great at it, sometimes you just get lucky, like putting your boat on the trailer. Hope this helps somebody, just remember, big anchor of the right type, and lots of anchor line out.
Charlie