Ramp Care

I need some advice from those of you who have wheelchair ramps.

My ramp is built out of decking material - pressure treated wood. When it gets wet or cold and wet, or just covered in dew, it gets very slippery. Is there something I can put on it that would help?

And how do you handle snow and lots of it? Do you just shovel the ramp like you would a driveway, or do you put a tarp down before it snows, or something else that would make the job of clearing the ramp quicker and easier?

If things work out and Johnny gets to join our family, using the ramp will be a necessity and something we will not be able to do without. So, I guess I just need advice on the care and upkeep of our ramp.

Can you help?