That's essentially what I use. As long as it'll carry the weight and isn't dry rotted, it'll get you home. Just take it slow until you can get a good trailer tire back on. Mixing bias with radials might give you some problems but I've never tried it myself.
Trailer tires have stiffer sidewalls than car tires. An LT tire is a closer match than a car tire because of the sidewalls. I have LT's on my 4 horse trailer that came off my pickup and they pull great at 60.
