Oh no. You can get close to any star of your choosing with only minuscule amounts of reaction mass if you start out in vacuum away from significant gravity wells - eventually. Granted, the star in question may or may not have gone supernova or collapsed into a black hole by the time you arrive, but I doubt that'll make a lot of difference to the person doing it at that point.

With that said, I'm not about to discourage anybody from taking an interest in fusion of the up-close-and-personal-kind. And if people aren't into the math of Magnetohydrodynamics? Well, first off, sucks to be them, but second: Then donate to the cause to pay those who are. Fusion is fucking awesome, and we desperately need it.