i had the same blankets that i got from REI. other than the velcro, that's how i did mine.
the problem with the 5x7 size of these, they aren't big enough to cover the longer front bunk. the rear one fits them perfectly.
if you good on a sewing machine, getting a third blanket and cutting it up and sewing them onto the other two, will make a better setup.
but that's why PUGs are so popular, they custom-fit them for your particular hybrid/popup.
i was lucky that a former Roo owner from another hybrid forum, sent me his PUGs for only the cost of shipping.
the much larger PUG easily cover the front bunk.
i gave my generic blankets to a friend that has a Bantam hybrid.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC