I used colored packing tape. I like the tape's strength and field repairability. There are guys around here who use covering like econokote and have have done well with it, so I don't think it was a mistake on your part. Besides, you can always bring a roll of tape for quick field repairs if necessary.

Those plastic fuses are very tough, it's amazing how much they can go though and still be flyable with a little work. Just bring spare parts with you to the contest if you can. Spare sevo gears, pushrods, bits and pieces, that sort of thing. Chances are, your plane won't be destroyed, most damage is field-fixable in both A and SSC classes.

If you can afford it, getting a second kit or at least a second wing is a good idea. You wouldn't need a spare RX or even a full set of servos, or second engine right yet, since those things are usually not damaged badly.

Also, fwiw, I tend to take less chances around a beginner's plane than around someone more expereinced, so I mid-air far more often with the other experienced pilots than with the newer guys.