Yet another map load question

Hi all,

I'm new to forum but not to life

I'm going camping with grandsons in colo this august.

While I'm experienced with car gps nav, I don't know squat about topo
(I'm versed on compass, but lazy)

I've got a vista cx and a vista hcx - My question is - can I just purchase a micro sd version of Garmin mapsource 2008 topo from the site named after the famous south American river?

Then copy the card /install them to both my vistas?

I searched, but didn't find definite answers for vistc "C" series

I don't want to waste $80

thanx, greg

 

update yet another map question

ok, here's the update, when I said "search", I meant vista "c" on internet

I subsequently found numerous "free" maps, installed proper software, and am able to download more maps than I could use.

Was not the simplest process, but even tho' I'm lazy, I won't be deterred

luck,greg