I've done ok by myself this past season (my first competing). My wife has been around a couple times and aside from turn in box building she does absolutely nothing. Turn in boxes are a huge deal, sure but there are times where I have an hour or two with little/nothing to do and could handle building boxes in that time if she weren't there.
It's a lot of work, and there will be times you wish you had an extra pair of hands (to open/close lids, hand paper towels, etc), but it's absolutely do-able.
I'd suggest you do a practice run in the backyard. Do all four, make boxes, have deadline turn in times, etc. Do it entirely by yourself.
You'll either realize you can't/don't want to do it alone, or you'll realize that it's totally easy - it just needs to have steps dialed in with some practice and foresight so you go smoothly.
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