[Thanir]

I was a ski mechanic for about 10 years, and did a lot of hand tunes. If you get your ski's tuned make sure you they detune the tips and tails for you, it will make things a bit easier for you (most good shops will keep the edges sharp from tip to tail and you might need to ask them to detune them.) Detuning the tips and tails basically makes it so the skis are 'less grabby' in and out of turns.

Since you don't ski much, my main concern would just be to wax the bases. I good iron wax will replenish the bases, and let you glide much better. Waxing everyday is going over the top, as once a trip should be good enough. If at the end of your trip you find you don't glide all that well, run down to the shop and get a cheap roller wax and you'll be gtg.