ADVrider - Utah Backcountry discovery route questions.

Thinking of doing the utah backcountry discovery route this year with 2 bikes and a truck.
The idea is to take in the scenery do some day rides along the way, camp and explore some of the smaller towns close by.
The bikes will be a KTM 530EXC. Husqvarna TE511 and the truck a late model Toyota tacoma (fuel hauler,dog wagon, luggage, tents etc). The plan is to trailer down the bikes and go from there.
Here are my questions:
1. What mods, if any would you make on the bikes? I know they are more pure dirt orientated than dual sport long distance rides.
2. Is the route truck friendly?
3. what towns, if any are close by and worth a look? (good eateries etc).
4. Where could I potentially leave a trailer for a few days while we ride and camp?
5. What month is the best time to go?...heat isnt so much a problem as we are canadian, although 40C is pushing it.

Any ideas help. Ive mountain biked alot in these areas but never done any Motorcyling down there.
I have all the standard backcountry gear, SPOT/GPS etc as we do a fair bit out in the bush up here in Canada.

Cheers!