main sheet tention can slow down the traveler from raceing to the other side alittle but you really should have one hand on the sheets puttn them where it best , one on the tiller&when the traveler comes across throw the tiller to the other side along with your weight .If your a big guy "single handed"all that weight in the back of the boat can tip the balance as well so be ready to move where you need the weight most.
I was sailn into the wind wizn off the back of my cat when a gust of wind got under the tramp & the whole rig came over back wards, free willy.
I like erice advise about the knot in the traveler line.
carve the water, dig in those hulls.
hope some of this helps