John and I don't always agree, and this is one time. The Manson Supreme is a great anchor, and I have used several.
The 120 feet of chain, may be good for some areas of crusing where it is deep anchorage. Most of the loop is shoal water anchoring. Yes, the windlass "grips better" with chain--and that is why I like to have the 50 feet or so. You should not pull the boat to the anchor with the windlass, but power the boat to the anchor, and then use the boat to break out the anchor. The windlass is to lift the anchor from the bottom, once it is broken out.
The 120 feet of chain is considerably weight--and that is well forward in the boat. Again I prefer to have less weight there. On my large boats I did carry 120 to 200 feet of chain. Backed by 400 feet of nylon rode. My storm anchor used 50 feet of 1/2" Grade 4 chain. This weighed 2.5 lbs per foot or 125# a bit to carry from the bilge onto the deck, so we hoisted it thru a hatch with a winch.
Although one company uses grade 43 to designate, the more common convention to identify as system 40 High Test Anchor Chain.
The manufacturers refer to this chain as Grade 4, Grade 40, and Grade 43. The important thing to look for on the chain is a 4 stamped onto the link. BBB chain links will have BBB or 3B or G3 or G30 on it, while HT chain will have G4 or G40 or G43 stamped onto the side of the link. Basically, if you see a 3, you have regular chain, if you see a 4, you have HT chain (43 is just there to confuse you, but it has a 4 so it is HT).
To me the loop is to explore Eastern America. This is rivers, lakes and a lot of ICW's. You can run from marina to maraina--each night with the same group of boats--have your cocktail party and the next night the same. Or you can do like Jonathan Arthur of the minimalist 22, Salty.
Here is a link to his first of at least 5 loop completions with his stastics
In this case Jonathan runs the C Dory independently of marinas, and the crowds. he uses the shoal draft of the C Dory to explore creeks and byways. He stops in the towns and visits the museums and talks with a few of the people. He anchored out most nights. His total fuel costs were:$5,191.75. I would be very surprised if his total costs were anywhere near $25,000 for the entire trip. For many on this forum $25,000 is a very significant amount of money. A new 3/4 Diesel truck and a new C Dory are certainly not needed--and a total cost of only a small fraction of the $367,000 or more that my friend John suggests that it may cost to do the loop. In fact you could buy a very nice motor yacht, with room for two couples (as several of our C Dory owners did) for less than half of that.
Our own style is to anchor out most nights, no matter what boat we own, from a 20 ' Grady White to a 62' Ketch motorsailer, we anchor out the majority of nights. Our total yearly expenses for long term cruising, only a few years ago was less than $25,000 a year.
It depends on what you want the loop to be. A bucket list item because you have heard it was cool, a booze cruze, or an exploration of our hertiage and small town mid America.
Do the loop and enjoy the ride. It is not a contest--as some make it.