[Andy]

I would suggest that instead of coming out in front of home plate to observe the catch with a runner on third, that you move to the holding zone between third and home.

This lets you at least observe the runner at third peripherally and have a chance at catching the tag up or not....

When you're working solo, you have to prioritize. Your first priority is catch/no catch, then the tag ups at third, second, and first, respectively. The closer a runner is to home, the higher priority they have. Once you have the catch and tag up at third, you can move into the infield as the runner on third should score easily on this play, the runner on second should make it to third, and the likely play could be on the runner going from first to second. Make sure you keep your head on a swivel to try to catch the runner touching home. Lots of stuff to be responsible for.

If you work in these priorities, and they bitch at you about missing a tag up at first, you are much more credible when you tell them you have to work in priorities and a tag up at first is not the highest priority with bases loaded and a caught fly ball.