Thank you SO much to everyone who commented, I greatly appreciate it. So OmegaJasam, are there any other chunk loader blocks that I should be aware of besides dimensional anchors? See the thing is, most of the people on the server, besides myself and one of my friends, know next to nothing about Tekkit (yet), so I doubt they were able to figure out how to make chunk-loading blocks. So maybe there is a different thing I could try? Like for example, Omega you said that the chunks around the spawn are always kept loaded, do you know if there is a way where I can set it to load fewer blocks?
Also out of curiosity, should I see a massive spike in the amount of RAM being used with each new player that joins the server? Not necessarily for the first time players, but just anyone who joins when others are on? Thank you, thank you, thank you, to everyone who replied!