Got a Oregon 450T w/onxmaps for NM 3 yrs ago.
Maps have saved me many miles & opened a whole world that I had to rely on fences or signs in wrong places or not true before.
When G&F and local law uses it now for info,it is way to go.Up dates easy to get too.Discounts for RMEF members.
Like the big screen on 450 I can see, but I hate touch screens personally.
I leave mine switched off and have never had a problem with mine turning on hiking. I have it hanging on pack or belt with d-ring usually,or in top pouch of pack.